Given the chemical formula, how is this substance MOST LIKELY classified? A) atom B) compound C) both atom and compound D) neither atom nor compound

Answer:

6.26 mol.

Explanation:

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

mass of NaHCO₃ = 526.0 g, Molar mass of NaHCO₃ = 84.007 g/mol

∴ no. of moles (n) of NaHCO₃ = mass/molar mass = (526.0 g)/(84.007 g/mol) = 6.26 mol.

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

Answer:

The functional group

Explanation:

A functional group defines a hydrocarbon. an ester the functional group is an O- alkyl group while that one of an alcohol is -OH group. An aldehyde is a functional group on its own.

Answer: the functional group

Explanation:

Functional groups are specific group of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

1. Esters have functional group [tex]-O=C-OR[/tex].

Example: methyl ethanoate with molecular formula [tex]CH_3COOCH_3[/tex]

2. Alcohols have functional group [tex]-OH[/tex].

Example: Propanol with molecular formula [tex]CH_3CH_2CH_2OH[/tex]

3. Aledydes have functional group [tex]-O=CH[/tex].

Example: propanal with molecular formula [tex]CH_3CH_2CHO[/tex]

Thus esters , alcohols and aldehydes may have same number of carbon atoms and similar branching pattern but different functional groups.

Answer:

195.199grams

Explanation:

Fluorine has a molar mass of 18.99984 while calcium has a molar mass of calcium is 40.08.

1 mole of  calcium fluoride has a mass of 40.08+2×18.99984

=78.0797 grams

if one mole has a mass of 78.0797 grams, then 2.5 moles have:

2.5 moles× 78.0797 grams/mole= 195.1992 grams

Answer:

195

Explanation:

First, calculate the molar mass of CaF2:

Ca: 1 × 40.078 g/mol = 40.078 g/mol

F: 2 × 18.998 g/mol = 37.996 g/mol

40.078 g/mol + 37.996 g/mol = 78.074 g/mol CaF2

Then, convert moles to grams by multiplying the number of moles by the molar mass:

2.50 mol CaF2 × 78.074 g/mol CaF2 = 195 g CaF2

Answer:

Determine the value of the oxidation numbers of atoms or ions on the reactant side and the product side.

Explanation:

A redox reaction involves some ions, and atoms losing electrons and other gaining them in the same reaction. When oxidation occurs, there is loss of electrons by an element thus its oxidation number increases; becomes more positive. When reduction occurs an element gains electrons and the oxidation  number becomes more negative; reduces.

If an element (s) behaves in this manner in the whole reaction, then be sure to deduce that a redox reaction has occurred.

Answer:

If oxidation state changes, it is a redox reaction

Explanation:

Answer: the boiling point of a substance dosent bater how muc hof there it is if there is 100 gallons of water it still boils at 100 c jus takes longer due to more space but if you do 1 gallon it is also 100 c but is faster due to less space to heat up

Part 1:

It appears from the question that M refers to the boiling point of water when the mass is 2, and N refers to the boiling point of Soybean Oil also at a mass of 2. Without the exact figures for M and N given in the question, one can deduce that if both substances have the same mass, N, the boiling point of soybean oil, is greater than M, the boiling point of water. This is because water's boiling point is known to be 100 °C, which is significantly lower than that of soybean oil.

Part 2:

The boiling points of substances heavily depend upon intermolecular forces. Water has a high boiling point relative to its molar mass because of the strong hydrogen bonds between water molecules. However, soybean oil, which consists of long-chain hydrocarbons, likely has different intermolecular forces, such as London dispersion forces, which are stronger due to the larger molar mass and lead to an even higher boiling point.

Therefore, based on our understanding of intermolecular forces and the given information that soybean oil has a boiling point of 300 °C, we can confirm that N is greater than M.

Answer:

Herring might be eaten by anothe kind of fish that gulls eat.

Answer:

3 Hz

The frequency is three waves per second, or 3 Hz.                                                                

Answer:

96.31 g.

Explanation:

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O,

1.0 mole of CaCO₃ reacts with 2.0 moles of HCl to produce 1.0 mole of CaCl₂, 1.0 mole of CO₂, and 1.0 mole of H₂O.

no. of moles of CaCO₃ = mass/molar mass = (102 g)/(100.08 g/mol) = 1.019 mol.

Using cross multiplication:

1.0 mole of CaCO₃ produce → 1.0 mole of CaCl₂.

∴ 1.019 mole of CaCO₃ produce → 1.019 mole of CaCl₂.

∴ The amount of CaCl₂ produced = no. of moles x molar mass = (1.019 mol)(110.98 g/mol) = 113.1 g.

∵ percent yield of the reaction = [(actual yield)/(theoretical yield)] x 100.

Percent yield of the reaction = 85.15%, theoretical yield = 113.1 g.

∴ actual yield = [(percent yield of the reaction)(theoretical yield)]/100 = [(85.15%)(113.1 g)] / 100 = 96.31 g.

Answer:

96.3

Explanation:

took test

Answer: A

Explanation: Chemical changes don't change the mass. I also know that D in certainly incorrect

Answer:

Explanation:

Hope it helps.

Final answer:

The components of DNA include deoxyribose sugar molecules, adenine, phosphate molecules, cytosine, and thymine. Ribose sugar molecules and uracil are components of RNA, not DNA. DNA is constructed from nucleotides, which are the building blocks containing these components.

Explanation:

Components of DNA

DNA, or deoxyribonucleic acid, is composed of three types of molecules: deoxyribose sugar molecules, phosphate molecules, and nitrogenous bases. The nitrogenous bases in DNA are adenine, cytosine, guanine, and thymine. Therefore, the components of DNA that apply from your list are deoxyribose sugar molecules, adenine, phosphate molecules, cytosine, and thymine.

Ribose sugar molecules and uracil are not components of DNA; they are present in RNA (ribonucleic acid), which is another type of nucleic acid involved in protein synthesis and gene expression. DNA utilizes thymine as a base instead of uracil, and the sugar present in DNA is deoxyribose, which differs from ribose by lacking an oxygen atom on the second carbon.

The essential building blocks of DNA are the nucleotides, which consist of a deoxyribose sugar, a phosphate group, and one of the four nitrogenous bases (adenine, guanine, cytosine, and thymine). These nucleotides come together to form the double-helical structure of DNA, which is critical for its functions in storing and transmitting genetic information.

Answer:

e

Explanation:

This equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + When a small amount of acid is added to this system,

E. [CH3COO-] has increased and pH remains relatively constant.

acidic buffer

A mixture of a weak acid and its salt with a strong base serves as an acidic buffer. The reaction shows that some acetic acids react with the OH– from the base and converts it to water.

HCl and NaCl. Buffer is an equimolar mixture of weak acid and salt with a strong base.

To learn more about  a buffer solution, refer

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Answer:

7

Explanation:

divide 35 by 5 and you get 7

or do inverse operation 7 x 5 = 35

Answer:

[tex]\boxed{\text{7 m/s}}[/tex]

Explanation:

The formula for average speed is  

[tex]\text{speed} = \dfrac{\text{distance}}{\text{time}}\\\\s = \dfrac{d}{t}[/tex]

Data:

d = 35 m

t =   5 s

Calculation:

[tex]s = \dfrac{\text{35 m}}{\text{5 s}} = \text{7 m/s}[/tex]

The average speed of the ball is [tex]\boxed{\textbf{7 m/s}}[/tex]

Methane because I just know and it is very hard to explain

The organisms living in the hydrothermal vent are provided by the energy with methane. Thus, option C is correct.

Hydrothermal vents are the fissures near the volcanos in the seafloor that supports the ecosystem deep inside the sea.

The animals near the hydrothermal vents are octopus, crabs, zoarcid fishes, etc. The living of the organism in the cold water in the vent is supported by the absence of sunlight. The carbon compound act as the energy source at the hydrothermal vent.

Thus, the organisms in the hydrothermal vent are supported with energy by methane molecules. Hence, option C is correct.

Learn more about the hydrothermal vent, here:

https://brainly.com/question/889725

I have posted the answetr in this picture.

Final answer:

There are approximately 5.045 x 10^24 molecules in 385.55g of NO2. This is calculated by first determining the number of moles in the given mass using its molar mass and then multiplying by Avogadro's number.

Explanation:

To calculate the number of molecules in 385.55g of NO2, we first need to determine the number of moles of NO2 in the given mass. The molar mass of nitrogen dioxide, NO2, is calculated as follows:

M(NO2) = 14 +(2)(16) = 46 g/mol

Then, we use the molar mass to convert grams to moles:

Number of moles of NO2 = mass (g) / molar mass (g/mol)

= 385.55g / 46 g/mol

= 8.381 mol of NO2

Afterward, we use Avogadro's number, which is 6.022 x 1023 molecules per mole, to find the total number of molecules:

Number of molecules = Number of moles × Avogadro's number

= 8.381 mol × 6.022 x 1023 molecules/mol

≈ 5.045 x 1024 molecules of NO2

Answer:

[tex]\boxed{\text{3.4 g}}[/tex]

Explanation:

Step 1. Calculate the moles of C₁₂H₂₂O₁₁

[tex]\text{n = 0.100 L} \times \dfrac{\text{1.0 mol}}{\text{1 L}}=\text{0.100 mol}[/tex]

Step 2. Calculate the mass of C₁₂H₂₂O₁₁

[tex]\text{m = 0.100 mol} \times \dfrac{\text{342.30 g}}{\text{1 mol}} = \text{3.4 g}\\\\\text{The mass of sucrose needed is }\boxed{\textbf{3.4 g}}[/tex]

Final answer:

To make a 100 mL of 1.0 M solution of C12H22O11, we need 34.23 grams of powdered drink mix, by first calculating the moles required (0.1 moles) and then using the molar mass (342.30 g/mol) to find the required mass.

Explanation:

To calculate the mass of powdered drink mix needed to make a 1.0 M solution of 100 mL using C12H22O11, we need to use stoichiometry. First, we should calculate the number of moles of C12H22O11 required for a 1.0 M solution. Since molarity is moles of solute per liter of solution, for 0.1 liters (100 mL) of a 1.0 M solution, 0.1 moles of solute is needed.

Next, we find the molar mass of C12H22O11, which is the sum of the atomic masses of each element multiplied by the number of each atom in the molecule:

The molar mass for C12H22O11 will be approximately 342.30 g/mol. The mass of the powdered drink mix needed is calculated as mass = moles × molar mass, which is 0.1 moles × 342.30 g/mol, equaling 34.23 grams. Therefore, we need 34.23 grams of C12H22O11 to make a 100 mL of 1.0 M solution.

Answer: The answer would be 131.2

Explanation: How I got my answer is quite simple. In order for it to turn into standard notation, it would need to be turned into the answer of an equation. The equation here would be "1.312 x 10^2". 10^2 would be 100. Multiply 100 by 1.312 will make the decimal point move 2 times to the right, so it will end up in front of the 2. That would make the answer 131.2

I hope this info helps! :P

Answer:

D

Explanation:

hope this helps

Answer:

A

Explanation:

Noble gases have a full valence shell, so D is correct.

Inert gases are another term for noble gases, so B is correct.

Noble gases are found in the last column, which is group 18. This makes C correct.

The last one is A, so that must be the one that is incorrect.

I hope this helped and please mark me as brainliest!

Answer:

1. Control of Radioactivity

This requires being able to control the neutron flux. Recall that in a nuclear reactor when a neutron is captured by a fuel nucleus (generally uranium) the nucleus splits releasing radioactive particles (or undergoes fission). Hence if we decrease the neutron flux we decrease the radioactivity. The most common way to reduce the neutron flux is include neutron-absorbing control rods. These control rods can be partially inserted into the reactor core to reduce the reactions. The control rods are very important because the reaction could run out of control if fission events are extremely frequent. In modern nuclear power plants, the insertion of all the control rods into the reactor core occurs in a few seconds, thus halting the nuclear reaction as rapidly as possible. In addition, most reactors are designed so that beyond optimal level, as the temperature increases the efficiency of reactions decreases, hence fewer neutrons are able to cause fission and the reactor slows down automatically.

2. Maintenance of Core Cooling

In any nuclear reactor some sort of cooling is necessary. Generally nuclear reactors use water as a coolant. However some reactors which cannot use water use sodium or sodium salts.

3. Maintenance of barriers that prevent the release of radiation

There is a series of physical barriers between the radioactive core and the environment. For instance at the Darling Nuclear Generation Station in Canada the reactors are enclosed in heavily reinforced concrete which is 1.8m thick. Workers are shielded from radiation via interior concrete walls. A vacuum building is connected to the reactor buildings by a pressure relief duct. The vacuum building is a 71m high concrete structure and is kept at negative atmospheric pressure. This means that if any radiation were to leak from the reactor it would be sucked into the vacuum building and therefore prevented from being released into the environment.

The design of the reactor also includes multiple back-up components, independent systems (two or more systems performing the same function in parallel), monitoring of instrumentation and the prevention of a failure of one type of equipment affecting any other.

Further, regulation requires that a core-meltdown incident must be confined only to the plant itself without the need to evacuate nearby residence.

Safety is also important for the workers of nuclear power plants. Radiation doses are controlled via the following procedures,

The handling of equipment via remote in the core of the reactor

Physical shielding

Limit on the time a worker spends in areas with significant radiation levels

Monitoring of individual doses and of the work environment

The answer is:

The new volume is equal to 206.5 L.

To solve this problem, we need to assume that the pressure is constant, and use the Charle's Law equation, so, solving we have:

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

We are given:

[tex]V_1=350L\\T_1=500K\\T_2=295K[/tex]

Then, using the Charle's Law equation, we have:

[tex]\frac{350L}{500K}=\frac{V_2}{295K}[/tex]

[tex]\frac{350L}{500K}=\frac{V_2}{295K}\\\\V_2=\frac{350L}{500K}*295K=206.5L[/tex]

Hence, we have that the new volume is equal to 206.5 L.

Have a nice day!

Answer:

Peatification and coalification

Explanation:

https://energyeducation.ca/encyclopedia/Coal_formation

Answer: Option (D)

Explanation: In order to form coal, two processes might be undergone and they are as follows-

Thus the correct answer is option (D).

Answer: The answer is (B).

Explanation:

Answer (A) is too broad because all chromosomes have alleles that control certain traits. This doesn't tell us anything about the species indicated in the question.

Answer (B) is the correct answer because homologous chromosomes can pair up during meiosis while heterogenous chromosomes cannot.

Answer (C) is incorrect because most species of animals and plants are diploids, meaning their chromosomes come in matching sets called homologous pairs.

Answer (D) is too broad because all chromosomes have DNA that is made up of genes. This doesn't tell us anything about the species indicated in the question.

Answer:

2/5

Explanation:

Make 40% to 40/100 simplify by dividing by 10 to 4/10 then simplify again by dividing by 2 to make 2/5

Answer:

3 Aluminum Oxide

Explanation:

It is not an element but a coumpound.

Al is Aluminum

O is oxygen.

Answer: The greenhouse gases cause Earth's surface to heat up from the sunlight.

Explanation: The greenhouse gases causes the Earth's surface to warm up in the morning and at night, the surface cools down. When it cools down, that gives the heat a chance to get back into the air, but some of the heat is trapped (which is caused by the greenhouse gases). That's why, on average, Earth stays at 58 degrees Fahrenheit.

Many chefs today are taught using a culinary arts book written in 1903.

This Is "TRUE"

True penn foster student also a job corps student ik cause my teacher told me this

Explanation:

Answer:

I believe it is;  The universe will stop expanding and collapse in a big crunch.

I may be wrong though so double check on that.

Explanation:

Answer:

The universe will stop expanding and collapse in a big crunch.

Explanation:

For apex The answer is b

In the equation Zn + 2HCl → ZnCl₂ + H₂, suppose 11 grams of zinc react with 12 grams of hydrogen chloride to form 16 grams of zinc chloride and an unknown amount of hydrogen gas. 7 grams of hydrogen gas will form. Therefore, option B is correct.

With the atomic number 30 and the symbol Zn, zinc is a chemical element. When the oxidation is removed, zinc transforms into a shiny-greyish metal that is slightly brittle at normal temperature. It is the first element in the periodic table's group 12

Oysters are the best source of zinc, but it is also abundant in red meat and fowl. Beans, almonds, crab, lobster, whole grains, breakfast cereals, and dairy products are additional excellent sources.

A non-metal hydrogen is displaced by a metal zinc in a single displacement reaction. As a reductant metal, zinc (Zn) dispenses hydrogen (H₂) from an aqueous solution of HCl to produce zinc chloride (ZnCl2) and hydrogen gas (H₂).

Thus, 7 grams of hydrogen gas will form, option B is correct.

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Answer:

The correct answer is B:  125 Nm

Explanation:

If an applied force causes rotation from upward to downward direction than the torque is clockwise and is called as negative clockwise torque. Minus sign represents the direction of the torque. SI unit of torque is Nm.

Given data:  

Force = 25 N

r = 5.0 m

Formula:

Torque = r x F

          = 5.0 m X 25 N

          = 125 Nm  

The clockwise torque is 125 Nm ( i.e -125 Nm. Here minus sign suggests that the torque is clockwise)

Answer:

125 Nm

Explanation:

What is the clockwise torque on the following lever?

5.0 Nm

125 Nm

250 Nm

0.0 Nm