A 1.50-liter sample of dry air in a cylinder exerts a pressure of 3.0 atmospheres at a temperature of 25°C. Without change in temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.0 atmosphere. What is the volume of the gas? (Be sure to use the correct number of significant figures.) 0.22 L 0.50 L 2.0 L 4.5 L

Answers

Answer 1

Answer:

4.5L

Explanation:

Given parameters:

Inital volume, V₁ of the dry air = 1.50L

Initial pressure P₁ = 3.0atm

Temperature = 25°C

Final pressure P₂ = 1.0atm

Final volume of gas,  V₂  = ?

To solve gas related problem, we apply Boyle's law based on the parameters given.

Boyle's law states that the volume of a fixed mass of gas is inversely proportional to the pressure provided that temperature is constant.

The law is simply expressed as:

                 P₁V₁ = P₂V₂

From the parameters given, the unknown V₂ which is the final volume.

Making  V₂ the subject of the equation gives:

                   V₂ = [tex]\frac{P_{1} V_{1} }{P_{2} }[/tex]

                   V₂ = [tex]\frac{3x1.5}{1}[/tex] = 4.5L


Related Questions

Among the four ecosystems, is the most diverse. In the second ecosystem, there are 4 species of producers, 8 primary consumers, 10 secondary consumers, and 10 tertiary consumers. If the number of species of primary consumers in the second ecosystem increases to 20, there will be .

Answers

Species will be four secondary and tertiary consumers will be 25

Explanation-

Given in the question the number of species is 4 then it will have 8 primary 10 secondary and 10 tertiary consumers.  If this number of primary consumers increases from 8 to 20 consumers then the number of species involved would be 10 { 4x20/8 }

Number of secondary consumers would also be increased and increased value would be 25 { 10x20/8 } then again comes the tertiary number of consumer which also increases. The number of tertiary consumers will increase to 25 { 10x20/8} same as secondary.  

Among the four ecosystems, ecosytem 3 is the most diverse. In the second ecosystem, there are 4 species of producers, 8 primary consumers, 10 secondary consumers, and 10 tertiary consumers. If the number of species of primary consumers in the second ecosystem increases to 20, there will be fewer producers in the ecosystem.

1. What is the specific heat of a substance that absorbs 2500 joules of heat when a sample of 100
g of the substance increases in temperature from 10 °C to 70°C?

Answers

Answer:

0.4167 J/°C.g.

Explanation:

To solve this problem, we can use the relation:

Q = m.c.ΔT,

where, Q is the amount of heat absorbed by substance (Q = 2500 J).

m is the mass of the substance (m = 100 g).

c is the specific heat of the substance (c = ??? J/°C.g).

ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 70°C - 10°C = 60°C).

∵ Q = m.c.ΔT

∴ c = Q/(m.ΔT) = (2500 J)/(100 g)(60°C) = 0.4167 J/°C.g.

The study of the chemical and bond is called chemistry. According to the law of thermodynamics, the heat transfer from the high temperature to the low temperature.

The correct answer to the question is 0.4167.

What is specific heat?The specific heat capacity of a substance is the heat capacity of a sample of the substance divided by the mass of the sample. Specific heat is also sometimes referred to as mass heat capacity.

To solve this problem, we can use the relation:

Q = m.c.ΔT,

where,

Q is the amount of heat absorbed by a substance (Q = 2500 J).M is the mass of the substance (m = 100 g).C is the specific heat of the substance (c = ??? J/°C.g).ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = 70°C - 10°C = 60°C).

Q = m.c.T

After the equation, we can get.

c = [tex]\frac{Q}{(m.T)} = \frac{(2500 J)}{(100 g)(60C)}\\ \\ = 0.4167[/tex]

Hence, the correct answer is 0.4167.

For more information about the heat, refer to the link:-

https://brainly.com/question/4147359

Which of these is not an environmental effect of deforestation? overcrowding flooding smog soil erosion

Answers

Answer:

Soil

Explanation:

Answer:

Overcrowding is not considered as environmental effect of deforestation.

Explanation:

Trees provide various advantages to the living beings. It acts as shelter to animal, birds and human beings. It provides various raw materials for the industry. Apart from this it checks the flooding, prevents soil erosion and protects the environment from smog formation.  

Deforestation refers to the process in which many trees are uprooted and destroyed. When trees are harmed it leads to stoppage of advantage caused by them. Overcrowding is not considered as environmental effect of deforestation as it has no relationship with deforestation.

Compare the densities of hydrogen, oxygen, and water.

Answers

Answer:

Water is a compound made up of two elements—hydrogen and oxygen. ... They are both colorless, odorless gases , and they both readily react with other elements—making them "reactive" elements. But in many ways they are very different from each other. Hydrogen has the lowest density of all the elements.

20 elements of the periodic table

Answers

Iron (Fe), sodium (Na), cadmium (Cd), zinc (Zn), potassium (K), uranium (U), plutonium (Pu), titanium (Ti), Germanium (Ge), Sulfur (S), oxygen (O), nitrogen (N), hydrogen (H), helium (He), carbon (C), fluorine (F), Aluminum (Al), argon (Ar), Barium (Ba), phosphorus (P)

Answer:

Explanation:

Hydrogen is a nonmetallic, colorless gas under ordinary conditions. It becomes an alkali metal under extreme pressure.

Atomic Number: 1

Symbol: H

Atomic Mass: 1.008

Electron Configuration: 1s1

Group: group 1, s-block, nonmetal

Helium is a light, colorless gas that forms a colorless liquid.

Atomic Number: 2

Symbol: He

Atomic Mass: 4.002602(2)

Electron Configuration: 1s2

Group: group 18, s-block, noble gas

Lithium is a reactive silver metal.

Atomic Number: 3

Symbol: Li

Atomic Mass: 6.94 (6.938–6.997)

Electron Configuration: [He] 2s1

Group: group 1, s-block, alkali metal

Beryllium is a shiny gray-white metal.

Atomic Number: 4

Symbol: Be

Atomic Mass: 9.0121831(5)

Electron Configuration: [He] 2s2

Group: group 2, s-block, alkaline earth metal

Boron is a gray solid with a metallic luster.

Atomic Number: 5

Symbol: B

Atomic Mass: 10.81 (10.806–10.821)

Electron Configuration: [He] 2s2 2p1

Group: group 13, p-block, metalloid

Carbon takes several forms. It's usually a gray or black solid, although diamonds may be colorless.

Atomic Number: 6

Symbol: C

Atomic Mass: 12.011 (12.0096–12.0116)

Electron Configuration: [He] 2s2 2p2

Group: group 14, p-block, usually a nonmetal although sometimes considered a metalloid

Nitrogen is a colorless gas under ordinary conditions. It cools to form a colorless liquid and solid forms.

Atomic Number: 7

Symbol: N

Atomic Mass: 14.007

Electron Configuration: [He] 2s​2 2p3

Group: group 15 (pnictogens), p-block, nonmetal

Oxygen is a colorless gas. Its liquid is blue. Solid oxygen may be any of several colors, including red, black, and metallic.

Atomic Number: 8

Symbol: O

Atomic Mass: 15.999 or 16.00

Electron Configuration: [He] 2s2 2p4

Group: group 16 (chalcogens), p-block, nonmetal

Fluorine is a pale yellow gas and liquid and bright yellow solid. The solid may be either opaque or translucent.

Atomic Number: 9

Symbol: F

Atomic Mass: 18.998403163(6)

Electron Configuration: [He] 2s2 2p5

Group: group 17, p-block, halogen

Neon is a colorless gas that emits a characteristic orange-red glow when excited in an electric field.

Atomic Number: 10

Symbol: Ne

Atomic Mass: 20.1797(6)

Electron Configuration: [He] 2s2 2p6

Group: group 18, p-block, noble gas

Sodium is a soft, silvery-white metal.

Atomic Number: 11

Symbol: Na

Atomic Mass: 22.98976928(2)

Electron Configuration: [Ne] 3s1

Group: group 1, s-block, alkali metal

Magnesium is a shiny gray metal.

Atomic Number: 12

Symbol: Mg

Atomic Mass: 24.305

Electron Configuration: [Ne] 3s2

Group: group 2, s-block, alkaline earth metal

Aluminum is a soft, silver-colored, nonmagnetic metal.

Atomic Number: 13

Symbol: Al

Atomic Mass: 26.9815385(7)

Electron Configuration: [Ne] 3s2 3p1

Group: group 13, p-block, considered a post-transition metal or sometimes a metalloid

Silicon is a hard, blue-gray crystalline solid that has a metallic luster.

Atomic Number: 14

Symbol: Si

Atomic Mass: 28.085

Electron Configuration: [Ne] 3s2 3p2

Group: group 14 (carbon group), p-block, metalloid

Phosphorus is a solid under ordinary conditions, but it takes several forms. The most common are white phosphorus and red phosphorus.

Atomic Number: 15

Symbol: P

Atomic Mass: 30.973761998(5)

Electron Configuration: [Ne] 3s2 3p3

Group: group 15 (pnictogens), p-block, usually considered a nonmetal, but sometimes a metalloid

Sulfur is a yellow solid.

Atomic Number: 16

Symbol: S

Atomic Mass: 32.06

Electron Configuration: [Ne] 3s2 3p4

Group: group 16 (chalcogens), p-block, nonmetal

Chlorine is a pale yellow-green gas under ordinary conditions. Its liquid form is bright yellow.

Atomic Number: 17

Symbol: Cl

Atomic Mass: 35.45

Electron Configuration: [Ne] 3s2 3p5

Group: group 17, p-block, halogen

Argon is a colorless gas, liquid, and solid. It emits a bright lilac-purple glow when excited in an electric field.

Atomic Number: 18

Symbol: Ar

Atomic Mass: 39.948(1)

Electron Configuration: [Ne] 3s2 3p6

Group: group 18, p-block, noble gas

Potassium is a reactive, silvery metal.

Atomic Number: 19

Symbol: K

Atomic Mass: 39.0983(1)

Electron Configuration: [Ar] 4s1

Group: group 1, s-block, alkali metal

Calcium is a dull silver metal with a faint yellowish cast.

Atomic Number: 20

Symbol: Ca

Atomic Mass: 40.078(4)

Electron Configuration: [Ar] 4s2

Group: group 2, s-block, alkaline earth metal

Hope That Helps!

Brainliest?

(the other person copied it from Google).


Isotopes are separated by

A. crystallisation
B. sublimation
C. distillation
D. filtration


In an atomic explosion, enormous energy is released which is due to

A. conversion of chemical energy into heat energy
B. conversion of mechanical energy into nuclear energy
C. conversion of mass into energy
D. conversion of neutrons into protons


Which among the following is a positively charged particle emitted by a radioactive element?

A. Beta ray
B. Alpha ray
C. Cathode ray
D. Gamma ray

Answers

Answer:

1.  C.  distillation

2.  B.  conversion of mechanical energy into nuclear energy

3.  B.  Alpha ray

Explanation:

17.
What do you know about a chemical compound by looking at its chemical formula

Answers

Answer:

The number and the kinds of atoms in the compound

Explanation:

A chemical formula of a compound contains symbols o the atoms of the elements present in the compound as well as the number of atoms of each element in the form of subscripts.Therefore it helps us to know the elements in a compound and the number of atoms in the compounds.

what are crystalline solids

Answers

Answer:

A solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

Explanation:

Crystalline solids:

Solids that have a regular and three-dimensional arrangement of constituent particles such as (atoms, molecules, or ions) are known as crystalline solids. A few examples of crystalline solids include sodium chloride, quartz, diamond, etc. There are four types of crystals:

ionic , metallic , covalent network,molecular

In crystalline solids, particles are arranged in a repeating pattern. They have a regular and ordered arrangement resulting in a definite shape.

Find more information about Crystalline solid here:

brainly.com/question/4795632

which of the following statements about natural resources is correct

solar power produces harmful chemicals

geothermal power requires more land than other power plants

nuclear power produces small amounts of energy from large masses

wind power requires a lot of space and depends on local weather patterns ​

Answers

Answer:

The right choice is "wind power requires a lot of space and depends on local weather patterns "

Explanation:

solar power produces harmful chemicals it is incorrect because solar power doesn't produce any chemicals

    2. geothermal power requires more land than other power plants  

  it is incorrect because geothermal power requires digging a stable 5 km-deep shaft not a land

    3. nuclear power produces small amounts of energy from large masses

it is incorrect because nuclear power produces large amounts of energy from small masses.

So the right choice is "wind power requires a lot of space and depends on local weather patterns "

A toaster transforms electrical energy into _____ energy and _____ energy. A. heat; light B. heat; kinetic C. heat; potential D. kinetic; potential

Answers

A. heat; light energies

Answer:

the answer is A; firstly heat then heat light.

A sample of gas in a balloon has an initial temperature of 20. ∘C and a volume of 1.92×103 L . If the temperature changes to 68 ∘C , and there is no change of pressure or amount of gas, what is the new volume, V2, of the gas?

Answers

Answer:

[tex]\boxed{2.23 \times 10^{3} \text{ L}}[/tex]

Explanation:

The pressure is constant, so we can use Charles' Law.

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

Data:

V₁ = 1.92 × 10³ L; T₁ = 20 °C  

V₂ = ?;                 T₂ = 68 °C

Calculations:

(a) Convert temperatures to kelvins

T₁ = (20 + 273.15) K = 293.15 K

T₂ = (68 + 273.15) K = 341.15 K

(b) Calculate the volume

[tex]\dfrac{ 1.92 \times 10^{3}}{293.15} = \dfrac{ V_{2}}{341.15}\\\\6.550 = \dfrac{ V_{2}}{341.15}\\\\V_{2} = 6.550 \times 341.15 = 2.23 \times 10^{3} \text{ L}[/tex]

The new volume of the gas is [tex]\boxed{2.23 \times 10^{3} \text{ L}}[/tex].

A scientist has three liquids in a beaker. Liquid 1 is the top layer, liquid 2 is the middle layer, and liquid 3 is the bottom layer. Write the order of the liquids from most dense to least dense.

Answers

Answer:

3>2>1

Explanation:

Liquid 3 is the densest and liquid 1 is the least dense of all. Liquid 2 would be in the middle as its density lies between that of liquids 1 and 3.

Density can be defined as the mass per unit volume of a liquid.

The more the mass the greater the density. Density increases with increasing mass of solute. We see that density shares a direct proportionality with mass.

In terms of volume, the more the volume of solvents the lesser the density. When we dilute some solutions, we tend to reduce their density. Density shares an inverse relationship with volume.

The densest solutions would go below while the least dense goes up.

Latoya performs an experiment using the lab equipment shown. Which two properties is Latoya most likely measuring?

Answers

Answer: Volume and temperature

Explanation:

Answer:

volume and temperature

Explanation:

the number of protons and neutrons in an atom is known as the
A.) isotope. B.) atomic number. C.) mass number. D.) energy level.

Answers

Answer:

Its B. Just look at google.

Answer:

The number of protons and neutrons in an atom is known as the mass number. C.)

Select all that apply. The density of an object is 0.950 g/cm3. It will float in which of the following materials? water, density = 1.00 g/cm3 olive oil, density = 0.920 g/cm3 ethyl alcohol, density = 0.789 g/cm3 citric acid, density = 1.660 g/cm3

Answers

Answer:

The object will float in water and citric acid.

Explanation:

The density of an object indicates if the object will sink or float in another substance:

The object will float, if it is less dense than the substance it is placed in.

The object will sink, if it is more dense than the substance it is placed in.

The object has density of (0.95 g/cm³) is less dense than water (density = 1.00 g/cm³) and citric acid (density = 1.660 g/cm³), so it will float in water and citric acid.

The object has density of (0.95 g/cm³) is more dense than olive oil (density = 0.920 g/cm³) and ethyl alcohol (density = 0.789 g/cm³), so it will sink in olive oil and ethyl alcohol.

So, the object will float in water and citric acid.

Finding the pH for [H+] = 9.4 * 10-3 M?

Answers

Answer:

pH = 2.0

Explanation:

To find the pH of a solution, take the -log[H+]. In this case, the -log(9.4 x 10^-3) equals 2.02687 which makes 2.0 when accounting for significant figures.

Can someone help me with Geography connection plz.

Answers

Hello There!

South of the equator, some crops grown were beans, cotton, peanuts, peppers, potatoes, coffee, millet and yams

The molecular weight of vitamin C , C6H8O6 is 176.12 grams over mol
What is the mass in grams of 0.000142 mole of vitamin C Express the answer using three significant figures

Answers

Answer:

0.0250 g.

Explanation:

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

∴ mass of Vitamine C = (n)(molar mass) = (0.000142 mol)(176.12 g/mol) = 0.02501 g = 0.0250 g. "three significant figures"

Hey sample of helium occupies 235 mL at 788 tour and 25°C. If the sample is condensed into a 0.115 L flask what will be the new pressure assuming constant temperature?

Answers

The new pressure of helium gas assuming constant temperature is equal to 1610.26 Torr.

Given the following data:

Initial volume = 235 mLFinal volume = 0.115 LInitial pressure = 788 TorrTemperature = 25°C.

Conversion:

Initial volume = 235 mL to L = [tex]\frac{235}{1000} = 0.235\;L[/tex]

To determine the new pressure assuming constant temperature, we would apply Boyle's law:

Mathematically, Boyle's law is given by the formula;

[tex]PV = k\\\\P_1V_1 = P_2V_2[/tex]

Where;

[tex]P_1[/tex] is the original (initial) pressure.[tex]P_2[/tex] is the final pressure.[tex]V_1[/tex] is the original (initial) volume.[tex]V_2[/tex] is the final volume.

Substituting the given parameters into the formula, we have;

[tex]788\times 0.235 = P_2 \times 0.115\\\\185.18 = 0.115P_2\\\\P_2 = \frac{185.18}{0.115} \\\\P_2 =1610.26\; Torr[/tex]

Find more information: https://brainly.com/question/1437490

The new pressure assuming constant temperature would be 1610.43 torr.

Given values:

Initial volume (V₁) = 235 mL = 0.235 L ( converted to liters)Initial pressure (P₁) = 788 torrInitial temperature (T₁) = 25°C = 298 K (converted to Kelvin)Final volume (V₂) = 0.115 LTemperature remains constant (T₂ = T₁ = 298 K)

Goal: Find the new pressure (P₂) in torr.

Ideal Gas Law:

We can use the ideal gas law, which states: P₁V₁ = P₂V₂Since the temperature remains constant, we can simplify the equation to: P₁V₁ = P₂V₂Rearrange to solve for P₂: P₂ = P₁V₁ / V₂Plug in the values: P₂ = (788 torr) × (0.235 L) / (0.115 L)Calculate P₂: P₂ ≈ 1610.43 torr

Therefore, the new pressure assuming constant temperature would be 1610.43 torr.

In your own words describe the process of a physical change

Answers

Answer:

Explanation:

The changes that matter undergoes are associated with properties.

A physical change is one that alters the physical properties of matter. The physical properties of matter tells us everything about what a substance is when no change is occurring to its constituents. Such properties can be observed with our senses or instruments or pieces of apparatus. Examples are state of matter, colour, odour, taste, texture etc.

In many ways, physical changes are easily reversible and required little energy to initiate. There is no change in mass and no new kinds of matter are produced.

Examples of physical changes are boiling, melting, freezing, condensation, sublimation, magnetization of metals, breaking of glass, cutting of wood.

Which of the following is not present in an atom?
Electron
Element
Neutron
Proton

Answers

Answer:

Element

Explanation:

since electron,neutron,and proton are inside of an atom, the answer would be elements, since elements are made up of atoms, but not present in the atom itself.

Answer:

b

Explanation:

convert 6.35 grams of aluminum sulfate to moles​

Answers

Answer:

There are 0.0186 moles of formula units in 6.35 grams of aluminum sulfate [tex]\rm Al_2(SO_4)_3[/tex].

Explanation:

What's the empirical formula of aluminum sulfate?

Sulfate is an anion with a charge of -2 per ion. When sulfate ions are bonded to metals, the compound is likely ionic.

Aluminum is a group III metal. Its ions tend to carry a charge of +3 per ion.

The empirical formula of an ionic compound shall balance the charge on ions with as few ions as possible.

The least common multiple of 2 and 3 is 6. That is:

Three sulfate ions [tex]\rm {SO_4}^{2-}[/tex] will give a charge of -6. Two aluminum ions [tex]\rm Al^{3+}[/tex] will give a charge of +6.

Pairing three [tex]\rm {SO_4}^{2-}[/tex] ions with two [tex]\rm Al^{3+}[/tex] will balance the charge. Hence the empirical formula: [tex]\rm Al_2(SO_4)_3[/tex].

What's the mass of one mole of aluminum sulfate? In other words, what's the formula mass of [tex]\rm Al_2(SO_4)_3[/tex]?

Refer to a modern periodic table for relative atomic mass data:

Al: 26.982;S: 32.06;O: 15.999.

There are

two Al, three S, andtwelve O

in one formula unit of [tex]\rm Al_2(SO_4)_3[/tex].

Hence the formula mass of [tex]\rm Al_2(SO_4)_3[/tex]:

[tex]\underbrace{2\times 26.982}_{\rm Al} + \underbrace{3\times 32.06}_{\rm S} + \underbrace{12\times 15.999}_{\rm O} = \rm 342.132\;g\cdot mol^{-1}[/tex].

How many moles of formula units in 6.35 grams of [tex]\rm Al_2(SO_4)_3[/tex]?

[tex]\displaystyle n = \frac{m}{M} = \rm \frac{6.35\;g}{342.132\;g\cdot mol^{-1}} = 0.0186\;mol[/tex].

Plz Help! If 0.0025 mol NaNO3 forms during the reaction, what is the concentration of NaNO3 in the final solution?

Please give a step-by-step solution to this problem.

Answers

Answer:

Hi! I hope this will help

you with your question, whether this is an assignment or not. The answer that I

get is 0.033 concentration.

If 0.0025 mol NaNo3 forms

during the reaction, the concentration of NaNO3 in the final solution should be

0.033.

The concentration of NaNO₃ in the final solution, considering the sum of the given volumes, is approximately 0.276 M.

To find the concentration of NaNO₃ in the final solution, we need to know the volume of the solution. However, since it's not provided in the question or the additional information, we'll assume that the final volume of the solution is the sum of the volumes given in the reference information (0.2L from Na+ and 50mL + 40mL for NO₃).

Step 1: Convert mL to Liters for NO₃ since the concentrations are in Molarity (moles/liter). Therefore, the total volume in liters is 0.2L + 0.05L + 0.04L = 0.29L.

Step 2: We know from the information given that 0.08 mol of NaNO3 is produced. Since this is less than the stated 0.0025 mol, we will use 0.08 mol as the correct value.

Step 3: Calculate the concentration in moles/Liter (Molarity) using the formula C = n/V, where 'C' is concentration, 'n' is the number of moles, and 'V' is the volume in liters. This gives us C = 0.08 mol / 0.29 L = approx 0.276 M NaNO₃.

The concentration of NaNO₃ in the final solution is approximately 0.276 M.

How are the colors in neon signs changed?

Answers

Answer:

Neon lights don't actually change colors.

Explanation:

Neon signs give the illusion of changing color by turning different components of the signs on or off.

Answer:

The color of the light depends on the gas in the tube. Neon lights were named for neon, a noble gas which gives off a popular orange light, but other gases and chemicals are used to produce other colors, such as hydrogen (red), helium (yellow), carbon dioxide (white), and mercury (blue).

Explanation:

those are all the color signs i know this because i did it before

Since the moon is so small in size in relation to the earth, only a small area of planet earth will see a:

lunar eclipse
corona
solar eclipse

Answers

Answer:

Solar eclipse

Explanation:

Why does every chemical reaction require a certain amount of activation energy?

A. Energy is released when the reactants begin to react.

B. Energy lost to the environment during the reaction must be replaced.

C. Forming the activated complex requires energy,

D.The products have more potential energy than the activated complex.

E. The reactants have less potential energy than the products,

Answers

E is the correct answer because both endothermic and exothermic reactions require activation energy. the reactants have less potential energy than do the products. Energy must be input in order to raise the particles up to the higher energy level.

Answer:

C. Forming the activated complex requires energy,

Explanation:

For any reaction (whether exothermic or endothermic) the reactant molecules need some minimum amount of energy known as Threshold energy.

Reactant molecules have some internal energy and they require some extra amount of energy to reach the threshold energy which is known as activation energy.

This activation energy is required to from an activated complex.

The activated complex is formed where reactant molecules come closer to each other and undergo effective collision. This causes the formation of products.

The amount of heat involved in the synthesis of 1 mole of a compound from its elements, with all substances in their standard states at 25°C, is called _____.


A) standard heat of formation


B) heat of solidification


C) enthalpy


D) heat of reaction

Answers

Answer:

A

Explanation:

Answer:

A) standard heat of formation

Explanation:

what is the volume of 12.0 grams of oxygen gas at STP

Atomic mass:O = 15.99 grams/moles

Answers

Answer:

16.82 L.

Explanation:

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm (P = 1.0 atm, STP conditions).

V is the volume of the gas in L (V = ??? L).

n is the no. of moles of the gas in mol (n = mass/molar mass = (12.0 g)/(15.99 g/mol) = 0.7505 mol).

is the general gas constant (R = 0.0821 L.atm/mol.K),

T is the temperature of the gas in K (T = 0.0°C + 273 = 273.0 K, STP conditions).

∴ V = nRT/P = (0.7505 mol)(0.0821 L.atm/mol.K)(273.0 K)/(1.0 atm) = 16.82 L.

A light year is approximately ____.

A) 9.5 trillion kilometers
B) 95 trillion kilometers
C) 150 million kilometers
D) 150 billion kilometers ​

Answers

Answer : A light year is approximately 9.5 trillion kilometers - A)

Answer:

the answer is A) 9.5 trillion kilometers

Explanation:i got you ny g m

how much ammonium chloride is needed to saturate 100 grams of water at 60 degrees Celsius​

Answers

Answer:

55.3 g / 100.0 g of water.

Explanation:

From the solubility curve determine the solubility of ammonium chloride in g/100 g of water at 60°C.

The theoretical value is 55.3 g.

Other Questions
While training for a marathon, Jeff wants to increase the number of miles he runs each day. On the first day of training, Jeff runs 5 miles. He plans on increasing the number of miles he runs a day by 1 for the remainder of the week. Write a series to model the situation. Also the series doesn't have to be more than seven numbers***** Which statement would a federalist be most likely to agree with? A. The federal government must act quickly to find new international trading partners.B. The federal government can only function effectively if it has the ability to collect taxes.C. It is dangerous for a national government to have too much power.D. The United States should not have a single, powerful chief executive. find the height of a cylinder with a volume of 1215pi mm and a radius of 9mm Two supplementary angles are congruent. Which equation gives the measure in degrees, d, of each angle? Please help me with this A running mountain lion can make a leap 10.0 m long, reaching a maximum height of 3.0 m.?a.What is the speed of the mountain lion just as it leaves the ground? b.At what angle does it leave the ground? 1. When a person does strenuous exercise, small blood vessels (capillaries) near the surface of the skin increase in diameter. This change allows the body to be cooled. Which of the following best illustrates these statements?1PointsAexcretionBhomeostasisClocomotionDsynthesis2. Which characteristic is shared by all prokaryotes and eukaryotes?1PointsAability to store hereditary informationBuse of cellular respiration for energy releaseCuse of organelles to control cell processesDability to move in response to environmental stimuli3. Which cell structures are correctly paired with their functions?1PointsAThe mitochondria produce enzymes and ribosomes transport them.BThe ribosomes make proteins and the nucleus stores genetic information.CThe cell membrane makes enzymes and cytoplasm transports them.DThe vacuole stores genetic information and chloroplasts make proteins.4. What term describes the light-absorbing molecule that plants use to absorb energy?1PointsAgranaBpigmentsCstromaDthylakoids New species can form through allopatric or sympatric speciation. Which of the following mechanisms will act more strongly on populations that are initially separated in allopatry than on those initially separated in sympatry?reinforcementgenetic driftgene flowdisruptive selection in an eslastic ,the momentum is_______and the mechanical energy is round 249,982 to the nearest hundred Whats the square root of 12? A 20-cm long spring is attached to the wall. When pulled horizontally with a force of 100N, the spring stretches to a length of 22cm. What is the value of the constant? A.) The same spring is used in a tug of war. Two people pull on the ends, each with a force of 100N. How long is the stretched string? B.) The same spring is now suspended from a hook and a 10.2kg block is attached to the bottom end. How long is the stretched spring? What was the outcome of the Iranian revolution in 1978?A.) The shah was reinstated and his government clamped down on dissenters.B.) Democracy was reinstated and Iranian citizens gained a voice in the government.C.) A moderate government that encouraged religious toleration arose.D.) An Islamic ruler established repressive rule and denounced Western values. Which sentence uses the most appropriate tone for a formal speech? A6sideddieisrolledandthenacoinisflippedduringtheprocessofagame.Jacobwinsthegameifatailisflippedandanevennumberisrolled.Amandawinsthegameifaheadisflippedonthecoin.a. Howmanydifferentoutcomesarethere?b. WhatistheprobabilitythatJacobwins?c. WhatistheprobabilitythatAmandawins?d. Isthegamefair?e. Arethereanyoutcomeswherethegameisnotdecided? Rewrite the expression with rational exponents as a radical expression. why are the girls from the outsiders alone and without a car Escoge la mejor respuesta. Select the best answer. La pintura Escena de inquisicin, hecha por Francisco Goya, muestra ________. La prdida de la libertad religiosa la cada de la ciudad de Granada el descubrimiento del Nuevo Mundo la justicia de los Reyes Catlicos Jeff's salary is 25% higher than Josh's. By how many percents is Josh's salary less than Jeff's? Laura's Coffee Shop makes a blend that is a mixture of two types of coffee. Type A coffee costs Laura $5.50 per pound, and type B coffee costs $4.20 per pound. This month's blend used four times as many pounds of type B coffee as type A, for a total cost of $602.10. How many pounds of type A coffee were used? Steam Workshop Downloader