Question 1

Given the balanced chemical equation: $$2H_2(g) + O_2$(g) \rightarrow 2H_2O(g)$$, what is the mole ratio of $$H_2 to$$ $$O_2$$?

Accepted Answer

$$2:1$$

Question 2

In the reaction $$N_2(g) + 3H_2(g$$) \rightarrow 2NH_3(g)$$, if 6 moles of H_2$ react completely, how many moles of NH_3$ are produced?

Accepted Answer

$$4$$ moles

Question 3

For the balanced equation $$2SO_2(g) + O_2$(g) \rightarrow 2SO_3(g)$$, what is the volume ratio of $$SO_2 to$$ $$SO_3 at $$constant temperature and pressure?

Accepted Answer

$$2:2$$

Question 4

A reaction is represented by $$C_3H_8(g) + 5O_2(g) \rightarrow 3CO_2(g) + 4H_2O(g). If $$you start with 10 molecules of $$C_3H_8$$, how many molecules of $$CO_2$$ are produced?

Accepted Answer

$$30$$ molecules

Question 5

Which of the following statements about a balanced chemical equation is correct?

Accepted Answer

The coefficients represent the ratios of moles, molecules, and (for gases) volumes of reactants and products.

Question 6

If $$4$$ liters of $$O_2$$ react with $$8$$ liters of $$H_2 at $$STP according to $$2H_2(g) + O_2$(g) \rightarrow 2H_2O(g)$$, what is the maximum volume of $$H_2O$$ gas produced?

Accepted Answer

$$8$$ liters

Question 7

In the reaction $$2NO(g) + O_2$(g) \rightarrow 2NO_2(g)$$, what is the molecule ratio of $$NO to$$ $$NO_2$$?

Accepted Answer

$$2:2$$

Question 8

A chemical reaction is given by $$2KClO_3(s) \rightarrow 2KCl(s) + 3O_2(g). If$$ $$6$$ moles of $$O_2$$ are produced, how many moles of $$KClO_3$$ decomposed?

Accepted Answer

$$4$$ moles

Question 9

Which of the following best describes the relationship between the coefficients in a balanced chemical equation and the volumes of gaseous reactants and products (at the same temperature and pressure)?

Accepted Answer

The coefficients represent the volume ratios of the gases.

Question 10

For the reaction $$N_2(g) + 3H_2(g$$) \rightarrow 2NH_3(g)$$, if you have 9$ liters of H_2$ and excess N_2$, what volume of NH_3$ (in liters) can be formed at the same temperature and pressure?

Accepted Answer

$$6$$ liters

Question 11

A balanced equation is $$2Al(s) + 3Cl_2(g) \rightarrow 2AlCl_3(s). If $$you start with $$6$$ moles of $$Cl_2$$, how many moles of $$AlCl_3$$ can be formed?

Accepted Answer

$$4$$ moles

Question 12

In the reaction $$CH_4(g) + 2O_2(g$$) \rightarrow $$CO_2(g) + 2H_2O(g$$)$$, what is the ratio of the number of molecules of O_2$ used to CO_2$ produced?

Accepted Answer

$$2:1$$

Question 13

If $$5$$ moles of $$O_2$$ react with $$5$$ moles of $$H_2$$ according to $$2H_2 + O_2$ \rightarrow 2H_2O$$, which reactant is the limiting reagent?

Accepted Answer

$$H_2$$

Question 14

A reaction is given by $$2CO(g) + O_2$(g) \rightarrow 2CO_2(g). If$$ $$10$$ liters of $$CO$$ react with excess $$O_2$$, what is the volume of $$CO_2$$ produced at the same temperature and pressure?

Accepted Answer

$$10$$ liters

Question 15

Which of the following is NOT a correct interpretation of the coefficients in a balanced chemical equation?

Accepted Answer

They represent the mass ratios of reactants and products.

Interpreting Balanced Chemical Equations: Mole, Volume, and Molecule Ratios

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