Stoichoimetry

For the equation P4(s) + 5O2(g) -> P4O10(s), if 3 mol of phosphorus react with 10 mol of oxygen, the theoretical yield of phosphorus(V) oxide will be

2 mol

Ozone, O3, is produced in automobile exhaust by the reaction represented by the equation NO2(g) + O2(g) -> NO(g) + O3(g). What mass of ozone is predicted to form from the reaction of 2.0 g NO2 in a car's exhaust and excess oxygen?

2.1g O3

If the percentage yield for the reaction represented by the following equation is calculated to be 75.3%, what mass of Al is expected from the reaction of 52.5 g of Al2O3? 2Al2O3(l) -> 4Al(s) + 3O2(g)

20.9 g Al

What is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6H2O -> 4H3PO4

3:2

In the equation 2Al2O3 -> 4Al + 3O2, what is the mole ratio of aluminum to oxygen?

4:3

2Fe + O2 → 2FeO; how many grams of iron oxide will be produced from 8.00 mol of iron when O2 is in excess?

575 g FeO

For the reaction represented by the equation N2 + 3H2 -> 2NH3, how many moles of nitrogen are required to produce 18 mol of ammonia?

9

For the reaction represented by the equation SO3 + H2O -> H2SO4, what is the percentage yield if 500. g of sulfur trioxide reacts with excess water to produce 575 g of sulfuric acid?

93.9%

The measured amount of product obtained from a chemical reaction is called the

Actual yield

If, in the reaction A + B → C + D, the quantity of B is insufficient to react with all of A:

B is the limiting reactant

The substance that is not completely used up in a chemical reaction is known as the

Excess reactant

The substance that restricts the amount of other reactants used in a chemical reaction is known as the

Limiting reactant

In the formation of silicon carbide represented by the chemical equation SiO2(s) + 3C(s) -> SiC(s) + 2CO(g), 8 mol of each reactant are available for the reaction. What substance is the excess reactant?

SiO2(s)

The measured amount of product obtained from a chemical reaction is the

actual yield

If the percentage yield for a chemical reaction is 80.0%, the

actual yield is 80.0g for every theoretical yield of 100.g

When a chemical reaction is carried out under ideal conditions, it is implied that

all reactants are completely converted into products

The chemical equation P4O10 + 6H2O -> 4H3PO4 can be interpreted correctly as

both (a) and (b)

The actual yield of a chemical reaction is generally

less than the theoretical yield

The participation of reactants in a chemical reaction is restricted by the

limiting reactant

A balanced chemical equation allows one to determine the

mole ratio of any two substances in the reaction

The efficiency of a chemical reaction is best expressed by the

percentage yield

Reaction stoichiometry is based on chemical equations and

the law of conservation of mass

The number of significant figures in an answer to a stoichiometry problem is determined by

the number of significant figures of any measured quantities in the problem

Molar masses are determined from

the periodic table

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

theoretical yield

The limiting reactant of a reaction can be used to calculate the

theoretical yield

For the reaction represented by the equation Pb(NO3)2 + 2KI -> PbI2 + 2KNO3, how many moles of lead iodide are produced from 300. g of potassium iodide when Pb(NO3)2 is in excess?

0.904 mol PbI2

If cyclohexanol is burned as a fuel according to the following equation, how many moles of oxygen are needed to produce 13.7 mol of carbon dioxide? 2C6H12O + 17O2 -> 12CO2 + 12H2O

19.4 mol O2

In the chemical reaction: 4Fe(s) + 3O2(g) -> 2Fe2O3(s), the mole ratio of iron (III) oxide to iron is

1:2