The molar mass of carbon dioxide (CO2) is 44.01 g/mol. The molar mass of water (H2O) is 18.01 g/mol. A reaction uses 528 g of CO2. How many moles of water are used in this reaction?

Answers

Answer 1

Answer: The reaction that results from this is:

H2O + CO2 --> H2CO3

Stoichiometric ratio between water and CO2 is 1:1. So we can say that for every Mole of CO2, we need 1 Mole of water to produce 1 Mole of H2CO3. Thus as n=m/M we can find n = 528/44.01 = 11.997 ~ 12Mol.

therefore, we need 12 moles of water.

Answer 2

Answer:

Answer:

First one, 12.0.

Explanation:

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In which sample do molecules have the greatest average kinetic energy? A.) He at 100 K. B.) H2 at 200 K. C.) O2 at 300 K. D.) H2O at 400 K.

Answers

Answer: D.) $H_2O$ at 400 K.

Explanation:

Kinetic energy is the energy possessed by an object by virtue of its motion.

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=(3RT)/(2)$

K= kinetic energy

R= gas constant

T= temperature in Kelvin

From above, it is visible that kinetic energy is directly related to the temperature of the system. So, if temperature is more, average kinetic energy of the system is more.

Thus $H_2O$ at 400 K will have greatest average kinetic energy.

D.) H2O at 400 K, it doesn't really matter what the compound is, but only its temperature. Temperature is the average kinetic energy of the sample that we take, so the highest temperature indicates the greatest average kinetic energy.

What is the purpose of interphase in the eukaryotic cell cycle?

Answers

The correct answer is cell growth. Basically, during the interphase, the cell grows and the genetic material, the DNA, is multiplied as the cell becomes more and more ready for mitosis. After it's done with interphase, the cell moves into mitosis and cell division continues. The cell spends most of its life in this phase.

active growth and metabolism of the cell

Correct answer

Which of the statement below states the negative impact did chemistry have on society through the production and use of chlorofluorocarbons (CFCs)? A. Hazardous coolants in refrigeration units were replaced. B. Better refrigeration reduced loss of food through spoilage. C. Lower levels of ozone allowed more ultraviolet radiation to reach Earth. D. Fire safety improved through the use of fire extinguishers.

Answers

I think the correct answer from the choices listed above is option A. The statement that states a negative impact of chemistry on the society is that hazardous coolants in refrigeration units were replaced. One example of this coolant is the production and use of chlorofluorocarbons (CFCs) which replaced by more safer coolants.

Answer:

C. Lower levels of ozone allowed more ultraviolet radiation to reach Earth.

Explanation:

got it right on edge 23

Calculate the number of moles
9.00 g of H2O
88.0 g of CO2
1.70 g of NH3

Answers

no. of moles -= given mass/ molar mass

1) 9 g of H2O = 9/18 = 1/2 = 0.5 mole

2) 88g of CO2 = 88/44 = 2moles

3) 1.7 g of NH3 = 1.7/17 = 0.1 mole

number of moles= mass/molar mass
1. 9 g of H2O =9/18=0.5 moles
2.88 gof CO2=88/44=2 moles
3.70 g of NH3=70/17=4.12 moles

Under which conditions of temperate and pressure does oxygen gas behave least like an ideal gas

Answers

Under extremely high pressure and extremely low temperature. This is because part of the requirements of an ideal gas is that the atoms/molecules don't interact which brakes down at low temperatures and the atoms/molecules are point masses that have insignificant volumes compared to the volume the gas is in which breaks down at high pressures.

Which of the following is an oxidation-reduction reaction?Fe2O3 + 3CO mc009-1.jpg 2Fe + 3CO2
CuSO4 + 2NaOH mc009-2.jpg Cu(OH)2 + Na2SO4
2NaOH + H2CO3 mc009-3.jpg Na2CO3 + 2NaOH
Pb(NO3)2 + Na2SO4 mc009-4.jpg 2NaNO3 + PbSO4

Answers

I think the correct answer is the first chemical reaction given. The reaction, Fe2O3 + 3CO = 2Fe + 3CO2, represents an oxidation-reduction reaction. This type of reaction involves the gaining and losing of electrons of the elements involved in a reaction where it is essential that as one is losing some electrons, the other is gaining the electrons lost.

Answer:

The correct option is: Fe₂O₃ + 3CO → 2Fe + 3CO₂

Explanation:

An oxidation-reduction reaction, also known as the redox reaction, is a chemical reaction in which there is simultaneous transfer of electrons from one species to another.

The species that gains electrons gets reduced. Whereas, species that loses electrons gets oxidized.

Among the given options, only reaction 1 is a redox reaction:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Reason- In this reaction, iron (Fe) gains electrons and gets reduced from +3 oxidation state in Fe₂O₃ to 0 oxidation state in Fe. Whereas, carbon (C) loses electrons and gets oxidized from +2 oxidation state in CO to +4 oxidation state in CO₂.

Since both the oxidation and reduction reactions are occurring simultaneously.

Therefore, it is an redox reaction.

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