What can acid rain do to buildings and statues

Answers

Answer 1

Answer:

Corrosion and dissolution

Explanation:

Acid rain typically can corrode metallic parts of buildings thereby weakening them. Acids can generally affect most compounds in which metals are no exceptions. We find corrugated roofing sheets becoming weaker and less durable as the rain persists. This is due to the acidity of the rain in such an environment.

Acids reacts vigorously with limestone. Limestone can be used in construction works and it is one of the key component of cements. In contact with acid rain, cemented plasters on buildings can be dissolved and rendered weak.

Marble is a metamorphic limestone. It is rich in calcium carbonate. Due to its beautiful nature, it is used in building statues and for a host of stone works. Acid rain can dissolve statues and also make them weak. This reaction defaces them.


Related Questions

How many grams of aluminum hydroxide is in 4.41 mol of Al(OH)^3?

Answers

Answer:

344.02 g.

Explanation:

Knowing that the no. of moles can be calculated using the relation:

no. of moles (n) = mass/molar mass

no. of moles Al(OH)₃ = 4.41 mol & molar mass of Al(OH)₃ = 78.01 g/mol.

∴ mass = no. of moles * molar mass = (4.41 mol)*(78.01 g/mol) = 344.02 g.

December 21 is the first day of winter in the northern hemisphere. What season is it in the southern hemisphere? A. Beginning of winter B. Beginning of spring C. Beginning of summer D. Beginning of autumn (fall)

Answers

C beginning of summer. Brainiest would be greatly appreciated.

Summer because the seasons in the Southern Hemisphere is the opposite of the seasons in the northern hemisphere.

Which statement BEST describes why the rate of reaction will increase if you increase the concentration of a solution?
A) A higher concentration solution will only react at a higher temperature.
B) When the concentration of the solution increases, the amount of the other reactant also increases.
C) The higher number of molecules increases the number of collisions that will occur with the reactants.
D) If the concentration increases, the number of solution molecules decreases which gives more room for the reaction to occur.

Answers

C) The higher number of molecules increases the number of collisions that will occur with the reactants.

Hope this helps!!

Final answer:

Increasing the concentration of a solution leads to a higher rate of reaction due to an increased number of collisions between the reactant molecules.

Explanation:

The correct statement that explains why the rate of reaction increases when the concentration of a solution is increased is option C) The higher number of molecules increases the number of collisions that will occur with the reactants.

When the concentration of a solution increases, there are more particles of the reactants in the same volume. This means that there are more molecules available to collide with each other, leading to an increased chance of successful collisions and a higher rate of reaction.

For example, if you have a solution containing a high concentration of hydrochloric acid and you add more reactant particles, such as magnesium chips, to the solution, there will be more collisions between the hydrochloric acid molecules and the magnesium particles, resulting in a faster reaction.

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The reactant that controls the amount of product formed in a chemical reaction is called the?

Answers

Limiting reactant is the answer

Which of the following samples will have the greatest volume at STP?

22 g CO
22 g He
22 g O2
22 g Cl2
All of these samples would have the same volume at STP.

Answers

Answer:

The second choice: 22 g He will have the greatest volume at STP

Explanation:

Following Avogadro's principle, under ideal condtions, the volume of the gases at the same conditions of temperature, and pressure, is proportional to the number of molecules.

Then, you can calculate the number of molecules for each of the gases to determine which is the sample with the greatest number of molecules and, hence, which will have the greatest volume at STP (standard temperature and pressure).

The formula to calcualte the number of molecules (in moles) is:

n = mass in grams / molar mass

Then, since the mass is the same (22 g) for the four options, the result will be dependent on the molar mass: the gass witht the smallest molar mass will give the largest number of moles for 22 g, and will have the  greatest volume.

a) 22 g CO:

Molar mass of CO ≈ 28 g/mol

b) 22 g He:

Molar mass of He ≈ 4.0 g/mol

c) 22 g O₂

Molar mass of O₂ ≈ 32 g/mol

d) 22 g Cl₂

Molar mass of Cl₂ ≈ 71 g/mol

Conclusion: since He has the smallest molar mass, the sample of 22 g of He gas will have the greatest volume at STP.

Final answer:

All the given samples, i.e., CO, He, O2, and Cl2, each having a mass of 22 grams would occupy the same volume at standard temperature and pressure (STP) due to Avogadro's Law. Each of these samples is equivalent to 0.5 moles and thus, would occupy the same volume.

Explanation:

The volume of a gas at standard temperature and pressure (STP) is determined by the number of moles of the gas, not its mass. This is based on Avogadro's Law which states that equal volumes of all gases, at the same temperature and pressure, have the same number of molecules.

All of these samples are equivalent to 0.5 moles (given that the molar masses of CO, He, O2, and Cl2 are 28, 4, 32, and 71 g/mol respectively). Therefore, at STP (which is defined as a temperature of 273 K and a pressure of 1 atmosphere), each of these gas samples would occupy the same volume - about 11.2 liters (as a mole of any gas at STP occupies 22.4 liters).

So, the correct answer is that all these samples would have the same volume at STP.

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T/F. When a molecule contains three bonds and a single lone pair attached to the central atom, the molecular geometry is trigonal planar.

Answers

Answer:

False

Explanation:

In chemistry, trigonal planar is a molecular geometry model with one atom at the center and three atoms at the corners of an equilateral triangle, called peripheral atoms, all in one plane. In an ideal trigonal planar species, all three ligands are identical and all bond angles are 120°.

Meaning there shouldn't be any lone pair.

Look up "Structure of a trigonal planar molecule" for a visual

So it is false.

Which is the correct net ionic equation for the reaction of aqueous ammonia with nitric acid? Which is the correct net ionic equation for the reaction of aqueous ammonia with nitric acid?NH3(aq) + NO3−(aq) → NH2−(aq) + HNO3(aq)NH4+(aq) + H+(aq) → NH52+(aq)NH2−(aq) + H+(aq) → NH3(aq)NH4+(aq) + NO3−(aq) → NH4NO3(aq)NH3(aq) + H+(aq) → NH4+(aq)

Answers

Answer:

The last option:

NH₃ (aq) +  H⁺ (aq)  →  NH₄⁺ (aq)

Explanation:

1) Word equation

Aqueous ammonia + nitric acid → aqueous ammonium nitrate

2) Chemical (molecular) equation

NH₃ (aq) + HNO₃ (aq)  → NH₄ NO₃

3) Ionization reactions

Write the dissociation of the soluble ionic compounds:

HNO₃ → H⁺ + NO₃⁻NH₄ NO₃ → NH₄⁺ + NO₃⁻

4) Total ionic equation:

NH₃ (aq) +  H⁺ (aq) + NO₃⁻ (aq) →  NH₄⁺ (aq) + NO₃⁻ (aq)

5) Net ionic equation

You must cancel the spectator ions, which are those ions that are repeated in both reactant and product sides, i.e. NO₃⁻. They are name spectator because they do not participate (change) during the reaction.

NH₃ (aq) +  H⁺ (aq)  →  NH₄⁺ (aq)

And that is the last choice of the list.

A chemical equation that depicts the aqueous electrolytes as dissociated ions is an ionic equation.  The ionic equation is shown by [tex]\rm NH_{3} (aq) + H^{+} (aq) \rightarrow NH_{4}^{+} (aq).[/tex]

What is the ionic equation?

The ionic equation is the depiction of the ions of the compounds or the substances involved in the reaction.

The word equation for the aqueous ammonia with nitric acid can be shown as,

[tex]\text{Ammonia (aq) + nitric acid} \rightarrow \text{Ammonium nitrate (aq)}[/tex]

Its molecular reaction can be shown as,

[tex]\rm NH_{3} (aq) + HNO_{3} (aq) \rightarrow NH_{4} NO_{3}[/tex]

The dissociation of the ions can be shown as,

[tex]\rm HNO_{3} \rightarrow H^{+} + NO_{3}^{-}[/tex]

[tex]\rm NH_{4} NO_{3} \rightarrow NH_{4}^{+} + NO_{3}^{-}[/tex]

The total ionic reaction will be,

[tex]\rm NH_{3} (aq) + H^{+} (aq) + NO_{3}^{+}(aq) \rightarrow NH_{4}^{+}(aq) + NO_{3}^{-} (aq)[/tex]

The total net ionic reaction can be shown as,

[tex]\rm NH_{3} (aq) + H^{+} (aq) \rightarrow NH_{4}^{+} (aq)[/tex]

Therefore, option D. [tex]\rm NH_{3} (aq) + H^{+} (aq) \rightarrow NH_{4}^{+} (aq)[/tex] is the net ionic reaction.

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In some areas of the Earth, the crust is squeezed and pushed upward. This is a _______ process in that it directly forms _______. A. destructive; caves B. constructive; canyons C. destructive; soil D. constructive; mountains

Answers

Answer:

D; constructive; mountains

Answer:

D.) Constructive , Mountains

Explanation:

I got it right in study island

In order to calculate the number of neutrons you must subtract the ______ from the ________.

Answers

Answer:

In order to calculate the number of neutrons you must subtract the atomic number (number of protons) from the mass number.

Explanation:

The nucleus of an atom is consituted by protons and neutrons. The electrons are out of (surrounding) the nucleus.

The elements are uniquely identified by the atomic number, which is the number of protons.

Since, the mass of the electrons is barely 1 / 1840 times the mass of the protons or neutrons, the mass of the atoms is approximated to the mass of protons and neutrons. The relative mass of neutrons and protons is practically 1.

So, the mass number of an atom is the sum of the protons and neutrons.

The symbols and equation used are:

Atomic number, Z = number of protons

Number of neutrons = N

Mass number, A = protons + neutrons = Z + N

Hence, to calculate the number of neutrons, N, you solve from that equation:

A = Z + N ⇒ N = A - Z

Which means that to calculate the number of neutrons you subtract the atomic number from the mass number.

Final answer:

To calculate the number of neutrons in an atom, subtract the atomic number (number of protons) from the mass number (total number of protons and neutrons). You can find these numbers on the periodic table for each element.

Explanation:

In order to calculate the number of neutrons in an atom, you must subtract the atomic number from the mass number. The atomic number (Z) represents the number of protons in an atom's nucleus and defines the identity of that atom. For instance, an atom with six protons is the element carbon with the atomic number 6. The mass number (A), on the other hand, is the total number of protons and neutrons in an atom. So, the formula to calculate the number of neutrons is A - Z = number of neutrons.

For example, let's take the element Fe (Iron). Iron has an atomic number of 26, indicating it has 26 protons. Its atomic mass is typically around 56. To find the number of neutrons, simply subtract the atomic number from the mass number: 56 - 26 = 30. Therefore, a typical atom of iron has 30 neutrons.

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Elements in group 17 are known as salt formers they are called

Answers

They are called earth alkali metals. Elements in groups 3 through 12 have many useful properties and are called transition metals. Elements in group 17 are known as “salt formers”. They are called halogens.

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Group 17 elements, known as halogens, include fluorine, chlorine, bromine, iodine, and astatine. Derived from Greek for "salt forming," they are highly reactive and commonly found in nature as halide salts.

The elements in Group 17 are known as the halogens, a term derived from the Greek words for "salt forming." They include fluorine, chlorine, bromine, iodine, and astatine. Halogens have a distinctive chemical property; they react readily with metals to form compounds like sodium chloride and calcium chloride. Because of their reactivity with alkali metals and alkaline earth metals, they can form a wide range of halide salts.

The elements of Group 17 are characterized by having the general electron configuration ns²np⁵ with seven valence electrons, making them highly reactive as they are one electron short of having a full outer shell. While these elements do not occur freely in nature due to their reactivity, they are abundantly found as halide salts such as those in the mineral fluorspar, which consists mainly of calcium fluoride.

If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sample change?


A) 2

B) 1/4

C) 1/8

D) 1/2

Answers

Answer:

D) 1/2

Explanation:

Using Ideal gas equation for same mole of gas as

[tex] \frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}[/tex]

Given,

P₂ = 4P₁

T₂ = 2T₁

Using above equation as:

[tex] \frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}[/tex]

[tex] \frac {{P_1}\times {V_1}}{T_1}=\frac {{4\times P_1}\times {V_2}}{2\times T_1}[/tex]

[tex]V_2=\frac{1}{2}\times V_1[/tex]

The volume change by half of the original.

¹/₂

Further explanation

Given:

P₂ = 4P₁T₂ = 2T₁

Question:

By what factor does the volume of the sample change?

The Process:

We use an equation of state for an ideal gas:  

[tex]\boxed{\boxed{ \ \frac{pV}{T} = constant \ }}[/tex]

p = pressure (in Pa) V = volume (in m³) T = temperature (in Kelvin)

For the same amount of substances in two states, the equations for state-1 and state-2 are as follows:

[tex]\boxed{ \ \frac{p_2V_2}{T_2} = \frac{p_1V_1}{T_1} \ }[/tex]

Let us use the equation above to see the relationship between volumes. Enter all the information in the equation.

[tex]\boxed{ \ \frac{4p_1V_2}{2T_1} = \frac{p_1V_1}{T_1} \ }[/tex]

[tex]\boxed{ \ \frac{4V_2}{2} = V_1} \ }[/tex]

[tex]\boxed{ \ 2V_2 = V_1} \ }[/tex]

[tex]\boxed{ \ V_2 = \frac{1}{2}V_1} \ }[/tex]

Thus by factor ¹/₂, the volume of the sample will change.

- - - - - - - - - -

Notes

[tex]\boxed{ \ \frac{pV}{nT} = R \ } \rightarrow \boxed{ \ pV = nRT \ }[/tex]

n = moles of ideal gas

R = the molar gas constant (in J mol⁻¹ K⁻¹)

Learn more To what temperature would you need to heat the gas to double its pressure?  https://brainly.com/question/1615346# The volume of Kr (in liters) https://brainly.com/question/6043528The energy density of the stored energy https://brainly.com/question/9617400  

Keywords: the pressure of a gas sample, an ideal gas, volume, constant, moles, equation of state , quadrupled, the absolute temperature, doubled, by what factor, change

From standard reduction potentials, calculate the equilibrium constant at 25 ∘c for the reaction 2mno−4(aq)+10cl−(aq)+16h+(aq)→2mn2+(aq)+5cl2(g)+8h2o(l)

Answers

Final answer:

To calculate the equilibrium constant at 25°C for the given reaction, use the information from the standard reduction potentials given in the question. Write the half-reactions and use the Nernst equation to calculate the cell potential. Then, calculate the equilibrium constant using the relation ΔG = -RTlnK.

Explanation:

To calculate the equilibrium constant at 25°C for the given reaction, we need to use the information from the standard reduction potentials given in the question. We can first write the half-reactions for the species involved in the reaction:




 2MnO4-(aq) + 16H+(aq) + 10e- → 2Mn2+(aq) + 8H2O(l)
 10Cl-(aq) → 5Cl2(g) + 10e-



Then, we can use the Nernst equation to calculate the cell potential for the reaction:



Nernst equation:



E = E0 - (0.0592/n) * log(Q)



Where:




 E is the cell potential
 E0 is the standard cell potential
 n is the number of electrons transferred in the balanced equation
 Q is the reaction quotient, which can be calculated using the concentrations of the species involved



By calculating the cell potential and using the equation ΔG = -nFEcell, where ΔG is the change in Gibbs free energy, F is Faraday's constant, and Ecell is the cell potential, we can then calculate the equilibrium constant K using the relation ΔG = -RTlnK.



By substituting the values into the equations and calculating, we can find the equilibrium constant for the given reaction at 25°C.

Final answer:

To calculate the equilibrium constant for a redox reaction, one must balance the half-reactions, find the standard potentials for both, and then use these values with the Nernst equation and the relationship between free energy and the equilibrium constant.

Explanation:

To calculate the equilibrium constant at 25 °C for the redox reaction given, we need to use the standard reduction potentials of each half-reaction. First, we balance the half-reactions for each species involved.

For MnO⁴⁻ reduction to Mn²⁺:

MnO⁴⁻(aq) + 8H⁺⁺(aq) + 5e⁻ → Mn²⁺(aq) + 4H₂O(l)

For Cl⁻ oxidation to Cl₂:

2Cl⁻(aq) - 2e⁻ → Cl₂(g)

After balancing, we use the Nernst equation to find the standard cell potential (E° cell) by subtracting the standard reduction potential of the anode (E° anode) from the cathode (E° cathode).

E° cell = E° cathode - E° anode

Then, the equilibrium constant (K) is related to the standard cell potential by the following equation, where n is the number of moles of electrons transferred and F is the Faraday constant:

ΔG° = -nFE° cell

And the standard free energy change (ΔG°) is related to the equilibrium constant (K) by the equation:

ΔG° = -RTlnK

Combining these equations and solving for K gives us:

lnK = nFE° cell / RT

By using the standard reduction potentials from the appendix and plugging in the values for n, F, R (the universal gas constant), and T (temperature in Kelvin), we can calculate K.

This approach allows us to understand the spontaneity and the composition of the equilibrium mixture for the reaction in question, providing valuable insights into the chemical process at equilibrium.

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points.

Li2SO4
NH4I
CoCl3

Answers

Answer:

CoCl₃ > Li₂SO₄ > NH₄I.

Explanation:

Adding solute to water causes depression of the boiling point.The elevation in boiling point (ΔTf) can be calculated using the relation:

ΔTf = i.Kf.m,

where, ΔTf is the depression in freezing point.

i is the van 't Hoff factor.

van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

Kf is the molal depression constant of water.

m is the molality of the solution.

(1) Li₂SO₄:

i for Li₂SO₄ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.

∴ ΔTb for (Li₂SO₄) = i.Kb.m = (3)(Kf)(m) = 3(Kf)(m).

(2) NH₄I:

i for NH₄I = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.

∴ ΔTb for (NH₄I) = i.Kb.m = (2)(Kf)(m) = 2(Kf)(m).

(3) CoCl₃:

i for CoCl₃ = no. of particles produced when the substance is dissolved/no. of original particle = 4/1 = 4.

∴ ΔTb for (CoCl₃) = i.Kb.m = (4)(Kf)(m) = 4(Kf)(m).

So, the ranking of the freezing point from the highest to the lowest is:

CoCl₃ > Li₂SO₄ > NH₄I.

25 POINTS!!! HELP FAST
Why is the symbol E ^ O oxid used to show the standard reduction potential of an oxidation reaction in a half cell.

IN PICK ITS THE SECOND OPTION

Answers

im not sure wow super hard question

Can you please send me whole question picture to better assist you.

Thank you

Un estudiante debe preparar una disolución 2M de NaCl (58,44 g/mol) en un recipiente de 7L. ?Cuántos gramos de NaCl debe agregar?

Answers

Answer:

818.2 g.

Explanation:

Molarity is the no. of moles of solute per 1.0 L of the solution.

M = (no. of moles of NaCl)/(Volume of the solution (L))

M = 2.0 M.

no. of moles of NaCl = ??? mol,

Volume of the solution = 7.0 L.

∴ (2.0 M) = (no. of moles of NaCl)/(7.0 L)

∴ (no. of moles of NaCl) = (2.0 M)*(7.0 L) = 14.0 mol.

To find the mass of NaCl, we can use the relation:

no. of moles of NaCl = mass/molar mass

∴ mass of NaCl = (no. of moles of NaCl)*(molar mass) = (14.0 mol)*(58.44 g/mol) = 818.2 g.

The following reaction has an activation energy of 262 kJ/mol.
C4H8(g) ---> 2C2H4(g)
At 600.0 K the rate constant is 6.1*10^-8s^-1. What is the value of the rate constant at 750.0 K?

Answers

Answer: i really       dont know srry

Explanation:

40.0 mL of 0.200 M aqueous NaOH is added to 200.0 mL of 0.100 M aqueous NaHCO3 in a flask maintained at 25 ?C. Neglecting the effects of dilution, what is q for this reaction?

Answers

What does q stand for?

Answer : The 'q' for this reaction is, 328 J

Explanation :

First we have to calculate the moles of [tex]NaOH[/tex] and [tex]NaHCO_2[/tex].

[tex]\text{Moles of }NaOH=\text{Molarity of }NaOH\times \text{Volume of solution}=0.200mole/L\times 0.04L=0.008mole[/tex]

[tex]\text{Moles of }NaHCO_2=\text{Molarity of }NaHCO_2\times \text{Volume of solution}=0.100mole/L\times 0.2L=0.02mole[/tex]

From this we conclude that, the moles of [tex]NaOH[/tex] are less than moles of [tex]NaHCO_3[/tex]. So, the limiting reactant is, NaOH.

Now we have to calculate the 'q' for this reaction.

The balanced chemical reaction will be,

[tex]OH^-+HCO_3^-\rightarrow CO_3^{2-}+H_2O[/tex]

The expression used for 'q' of this reaction is:

[tex]q=n(\Delta H_f^o\text{ of product})-n(\Delta H_f^o\text{ of reactant})[/tex]

[tex]q=n[(\Delta H_f^o\text{ of }CO_3^{2-})+(\Delta H_f^o\text{ of }H_2O)]-n[(\Delta H_f^o\text{ of }HCO_3^-)+(\Delta H_f^o\text{ of }OH^-)][/tex]

where,

n = number of moles of limiting reactant = 0.008 mole

At room temperature,

[tex]\Delta H_f^o\text{ of }CO_3^{2-}[/tex] = -677 kJ/mole

[tex]\Delta H_f^o\text{ of }H_2O[/tex] = -286 kJ/mole

[tex]\Delta H_f^o\text{ of }HCO_3^-[/tex] = -692 kJ/mole

[tex]\Delta H_f^o\text{ of }OH^-[/tex] = -230 kJ/mole

Now put all the given values in the above expression, we get:

[tex]q=0.008mole[(-677kJ/mole)+(-286kJ/mole)]-0.008mole[(-692kJ/mole)+(-230kJ/mole)][/tex]

[tex]q=0.328kJ=328J[/tex]      (conversion used : 1 kJ = 1000 J)

Therefore, the 'q' for this reaction is, 328 J

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is

Answers

Answer:

S₂(s) + C(s) → CS₂(s).

Explanation:

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is:

S₂(s) + C(s) → CS₂(s).

1 mol of S₂(s) reacts with 1 mol of charcoal (C(s)) to produce 1 mol of CS₂(s).

please help

Rutherford's famous gold foil experiments shot heavy particles at a thin sheet of gold foil. What did he observe, and why did these observations eventually result in the addition of a nucleus to the atomic model?

Some of the heavy particles bounced off the foil, because there are positive particles spread throughout the atom.

Some of the heavy particles bounced off the foil, because there is a dense, positive area in the atom.

The heavy particles all passed straight through the foil, because the atoms are mostly empty space.

The heavy particles all bounced off the foil, because the subatomic particles have mass and volume.

Answers

The heavy particles all passed straight through the foil, because the atoms are mostly empty space.

Answer is third choice

Answer:  Some of the heavy particles bounced off the foil, because there is a dense, positive area in the atom.

Explanation:

In Rutherford's experiment, he took a gold foil and bombarded it with alpha particles which carry positive charge. He thought that the alpha particles will pass straight through the foil, but to his surprise, many of them passed through, some of them deflected their path and a few of them bounced back.

From this he concluded that in an atom, there exist a small positive charge in the center. Due to this positive charge, the alpha particles deflected their path and some of them bounced straight back their path.

Thus he concluded that there is a dense, positive area in the atom.

Explain two ways that voltaic cells and electrolytic cells are similar AND two ways that they differ.

Answers

Similarities:
•They both have cathode and anode charges.
•Cathode facilitates oxidation and the anode facilitates reduction.

Differences:
•Voltaic cells “work” autonomously, while electrolytic cells need an outside source of energy to work.
•While the voltaic cells’ redox reaction is uncalled-for, the electrolytic cells happen at a set time.

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what will the new volume of a 22.4L same of a gas at STP if the pressure remains constant and the temperature is cut in half? A.33.6L B. 44.8L C.11.2L D. 22.4 L

Answers

Answer:

[tex]\boxed{\text{C. 11.2 L}}[/tex]

Explanation:

The pressure is constant, so we can use Charles' Law to calculate the volume.

[tex]\dfrac{V_{1}}{T_{1}} = \dfrac{V_{2}}{T_{2}}[/tex]

Data:

V₁ = 22.4 L; T₁ = 273.15 K

V₂ = ?;         T₂ = 136.58 K

Calculations:

[tex]\dfrac{ 22.4}{273.15} = \dfrac{ V_{2}}{136.58}\\\\0.082 00 = \dfrac{ V_{2}}{136.58}\\\\V_{2} =0.082 00 \times 136.58 = \boxed{\textbf{11.2 L}}[/tex]

A Sample Of Oxygen Gas Is Collected Over Water At 22°C And 98.67 KPa Pressure. If The Partial Pressure Of The Water Is 2.67 KPa, The Partial Pressure Of The Oxygen Is?

Answers

Answer:

The partial pressure of the oxygen gas is 96.00 KPa

Explanation:

The law of partial pressures states that, in a mixture of gases, the total pressure of the mixture is equal to the sum of the individual pressures of each gas, as if each gas were alone in the mixture.

So:

Total pressure = ∑ individual pressures

Total pressure = Partial pressure of the water + Partial pressure of oxygen

98.67 KPa = 2.67 KPa + Partial pressure of oxygen

Partial pressure of oxygen = 98.67 KPa - 2.67 KPa

Partial pressure of oxygen = 96.00 KPa ← answer

How is an isotope different from the standard form of a chemical element?

Answers

Answer:

The standard form of a chemical element is the natural mixture of several isotopes of the same element, which is atoms with the same number of protons but different number of neutrons, while an isotope is a particular kind of atom with a definite number of neutrons.

Explanation:

A chemical element is a pure substance formed by atoms with the same atomic number (number of protons). This is because it is the number of protons what identifies an element.

For example: oxygen is a chemical element, so oxygen is formed by only atoms of oxygen, and the atomic number of those atoms is 8, because every oxygen atom has 8 protons.

Nevertheless, some atoms of oxygen, may have different number of neutrons. Isotopes are different kind of atoms of the same element, which only differ in the number of neutrons. So, some atoms of oxygen will have 8 neutrons, other 9 neutrons, and other 10 neutrons (those are the stable isotopes of oxygen).

That difference in neutrons, is generally accepted that, does not modifiy substantially the chemical properties of the element, but the mass number. So, the isotopes with more neutrons wil be heavier, and the isotopes with less neutrons will be lighter.

Mass number = number of protons + number of neutrons.

In general a chemical element is formed by a mixutre of isotopes of the same element.

Answer:

its B :diffrent number of neutrons

Explanation:

What causes changes in weather? a. Air masses move and meet. c. Water evaporates. b. The air gets more humid. d. Clouds form.

Answers

Answer:

Air masses move and meet

Explanation:

The formation, movement, and collision of the air masses is one of the biggest and most noticeable changer of the weather conditions, be it locally, regionally, or globally. The air masses are constantly on the move, with the basic rule being - the heavier, denser air masses move toward the less dense, lighter air masses. Once they come in contact, the denser, heavier air masses push upward or backward the less dense, lighter air masses. The properties of the air masses depend on the place they have formed, so they can be dry, wet, cold, warm, and they are able to change the weather conditions literary in several minutes.

Answer:

Air masses move and meet

Explanation:

A(n) _____ may be defined as a compound which contributes hydroxide ions or increases the oh- concentration when dissolved in water. acid

Answers

Final answer:

A base is a compound that increases the concentration of hydroxide ions (OH-) in aqueous solution, according to the Arrhenius definition, which also states an acid increases the concentration of hydrogen ions (H+) in an aqueous solution.

Explanation:

A compound which contributes hydroxide ions (OH-) or increases the OH- concentration when dissolved in water is called a base. This definition aligns with the Arrhenius theory, formulated in 1884 by Svante Arrhenius. According to the Arrhenius definition, an acid is a substance that increases the concentration of hydrogen ions (H+) in an aqueous solution, while a base is a substance that increases the concentration of hydroxide ions in an aqueous solution.

An Arrhenius base is typically recognized by its ability to dissociate and release OH- ions into the solution, which can raise the pH level, making the solution more basic. For example, when sodium hydroxide (NaOH) is dissolved in water, it dissociates into Na+ and OH- ions, thereby increasing the hydroxide ion concentration in the solution.

Which statement best describes the electronegativity of an element?
A.
Electronegativity of an atom is its ability to lose electrons during cation formation.
B.
Electronegativity of an atom is its ability to share electrons during a covalent bond formation.
C.
Electronegativity of an atom is its ability to gain electrons during anion formation.
D.
Electronegativity of an atom is its ability to produce energy while losing an electron.
E.
Electronegativity of an atom is its ability to attract electrons during bond formation.

Answers

Hello!

Your answer is “e”

Electronegativity of an atom is it's ability to attract electrons during bond formation.

Answer: Option (E) is the correct answer.

Explanation:

Electronegativity is defined as the ability of an atom to attract electrons towards itself while formation of bond.

For example, chlorine is electronegative in nature and hence it will readily combine with potassium atom as potassium has one extra electron in its valence shell.

                        [tex]K + Cl \rightarrow KCl[/tex]

Thus, we can conclude that electronegativity of an atom is its ability to attract electrons during bond formation.

Some animals, like birds, reproduce by fusion of cells.
Before a bird hatches, what protects the bird as it develops?

A. the warmth of the sunlight

B. the thin shell of the egg

C. the nutrients from its mother's body

D .the hard shell of the egg

Answers

the hard shell off the egg

Answer: D

When 10 g of diethyl ether is converted to vapor at its boiling point, about how much heat is absorbed? (c4h10o, δhvap = 15.7 kj/mol, boiling point: 34.6°c) 0.2 kj 3 kj .01 kj 2 j?

Answers

Final answer:

When 10 g of diethyl ether is converted to vapor at its boiling point, approximately 2.12 kJ of heat is absorbed. This is calculated by first determining the number of moles in 10g of diethyl ether and then multiplying that by the given heat of vaporization.

Explanation:

To calculate the heat absorbed during the vaporization of diethyl ether, we first need to know the number of moles of diethyl ether. The molar mass of diethyl ether (C4H10O) is approximately 74 g/mol. So, 10 g of diethyl ether equates to roughly 0.135 moles (10g / 74g/mol).

Given that the heat of vaporization (δHvap) for diethyl ether is 15.7 kJ/mol, the total heat absorbed can be calculated by multiplying the number of moles by the heat of vaporization. Therefore, total heat absorbed would be approximately 2.12 kJ (0.135 moles * 15.7 kJ/mol).

So, when 10 g of diethyl ether is converted to vapor at its boiling point, approximately 2.12 kJ of heat is absorbed.

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To vaporize 10 g of diethyl ether at its boiling point, approximately 2.12 kJ of heat is absorbed. Thus, option C is correct answer.

To find the amount of heat absorbed when 10 g of diethyl ether (C₄H₁₀O) is vaporized, we need to use the enthalpy of vaporization ([tex]\Delta H_{vap}[/tex]) and the molar mass of diethyl ether.

First, calculate the molar mass of diethyl ether (C₄H₁₀O):

C: 12.01 g/mol × 4 = 48.04 g/molH: 1.008 g/mol × 10 = 10.08 g/molO: 16.00 g/mol × 1 = 16.00 g/molTotal = 48.04 + 10.08 + 16.00 = 74.12 g/mol

Next, determine the number of moles of diethyl ether in 10 g:

Number of moles = Mass / Molar mass = 10 g / 74.12 g/mol ≈ 0.135 moles

Given the enthalpy of vaporization, [tex]\Delta H_{vap}[/tex], is 15.7 kJ/mol, calculate the total heat absorbed using the formula:

Heat absorbed = Number of moles × [tex]\Delta H_{vap}[/tex] = 0.135 moles × 15.7 kJ/mol ≈ 2.12 kJ

Therefore, option c) about 2.12 kJ of heat is absorbed when 10 g of diethyl ether is vaporized at its boiling point of 34.6°C.

The complete question is as follows:

When 10 g of diethyl ether is converted to vapor at its boiling point, how much heat is absorbed? (C₄H₁₀O, [tex]\Delta H_{vap}[/tex] = 15.7 kJ/mol, boiling point: 34.6°C)

A. 20 KJ

B. 0.2 KJ

С. 2.12 kJ

D. 200 KJ

The innermost electron shell of an atom can hold up to _____ electrons.

Answers

Answer:

The innermost electron shell of an atom can hold up to 2 electrons.

Explanation:

The innermost electron shell is the lowest principal energy level, i.e n = 1.

For n = 1 there is only one orbital, the 1s orbital.

As stated by the Pauli's exculsion principle an orbital may have a maximum of two electrons, and they have opposed spins.

Then, the innermost electron shell has just one orbital and, in consequence, can hold up to 2 elecrons.

Final answer:

The innermost electron shell of an atom can hold up to two electrons.

Explanation:

The innermost electron shell of an atom, also known as the first shell or K-shell, can indeed hold a maximum of 2 electrons. This is often based on the quantum mechanical model of the atom, where the electrons are organized into various shells and subshells.

In addition to this, the first shell consists of only one subshell, called the 1s subshell, which accommodates a maximum of 2 electrons. The distribution of electrons in shells and subshells is a fundamental aspect of atomic structure and determines the chemical properties of elements, as well as their interactions in chemical reactions and bonding.

On the basis of molecular structure and bond polarity, which of the following compounds is most likely to have the greatest solubility in water and why?
a)CH4
b)CCL4
c)NH3
d)PH3

Answers

Answer:

[tex]\boxed{\text{c) NH$_{3}$; hydrogen bonding}}[/tex]

Explanation:

For each of these molecules, you must determine their VSEPR structure and then identify the strongest intermolecular forces.

Remember that water is a highly polar molecule.

a) CH₄

  Electron geometry: tetrahedral

Molecular geometry: tetrahedral

          Bond polarity: C-H bond nonpolar

  Molecular polarity: nonpolar

        Strongest IMF: London dispersion forces

 Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

b) CCl₄

  Electron geometry: tetrahedral

Molecular geometry: tetrahedral

          Bond polarity: C-Cl bond nonpolar

  Molecular polarity: nonpolar (symmetrical molecule. All bond dipoles cancel)

        Strongest IMF: London dispersion forces

 Solubility in water: low

A nonpolar molecule is insoluble in a polar solvent.

d) PH₃

  Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

          Bond polarity: P-H bonds are polar

  Molecular polarity: polar (all P-H bond dipoles point towards P)

         Strongest IMF: dipole-dipole

  Solubility in water: soluble

A polar molecule is soluble in a polar solvent.

c) NH₃

  Electron geometry: tetrahedral

Molecular geometry: trigonal pyramidal

          Bond polarity: N-H bonds are highly polar

  Molecular polarity:  highly polar (all N-H bond dipoles point towards N)

         Strongest IMF: hydrogen bonding

  Solubility in water: highly soluble

NH₃ is so polar that it can form hydrogen bonds with water.

[tex]\boxed{\textbf{The compound with the greatest solubility in water is NH$_{3}$}}[/tex]

Answer:

The correct answer is  [tex]NH_{3}[/tex].

Explanation:

The electron geometry of the [tex]NH_{3}[/tex] is tetrahedral and the molecular geometry is a trigonal pyramid.

The [tex]NH_{3}[/tex] has the strongest intramolecular hydrogen bond, which makes them a highly polar molecule.

The polarity is directly proportional to the solubility of the compound in the water.

Therefore,[tex]NH_{3}[/tex]  has the greatest solubility.

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