Stoichiometry

For the reaction represented by the equationCl2 + 2KBr => 2KCl +Br2, how many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?

188 g

Ozone, O3, is produced by the reaction represented by the following equation: NO2(g) + O2(g) => NO(g) + O3(g) What mass of ozone will form from the reaction of 2.0 g of NO2 in a car's exhaust and excess oxygen?

2.1 g O3

A balanced chemical equation allows one to determine the

mole ratio of any two substances in the reaction

For the reaction by the equation 2H2 + O2 => 2H2O, how many grams of water are produced from 6.00 mol of hydrogen?

108g

For the reaction represented y the equation 2H2 + O2 => 2H2O

12 mol

For the reaction represented by the equation 2Na + 2H2O => 2NaOH + H2, how many grams of sodium hydroxide are produced from 3.0 mol of sodium with an excess of water?

120g

For the reaction represented by the equation 3Fe + 4H2O => Fe3O4 + 4H2, how many moles of iron(III) oxide are produced from 500. g or iron in an excess of H2O?

2.98 mol

For the reaction represented by the equation SO3 + H2O => H2SO4, how many grams of sulfuric acid can be produced from 200. g of sulfur trioxide and 100.g of water?

245 g

Which equation is not balanced?

2H2 + O2 + H2O

The Haber process for producing ammonia commercially is represented by the equation N2(g) + 3H2(g) => 2NH3(g). To completely convert 9.0 mol hydrogen gas to ammonia gas, how many moles of nitrogen gas are required?

3.0 mol

In the reaction represented by the equation N2 + 3H2 => 2NH3, what is the molar ratio of hydrogen to ammonia?

3:2

In the equation 2KClO3 => 2KCl + 3O2, how many moles of oxygen are produced when 3.0 mol of KClO3 decompose completely?

4.5 mol

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

4:3

For the reaction represented by the equation 2KlO3 => 2KCl + 3O2, how many moles of potassium chlorate are required to produced 250. g of oxygen?

5.21 mol

For the reaction represented by the equation CH4 + 2O2 => CO2 + 2H2O, how many moles of carbon dioxide are produced from the combustion of 100. g of methane of 100. g of methane?

6.23 mol

For the reaction represented by the equation 2Na + Cl2 => 2NaCl, how many grams of sodium chloride can be produced from 500. g each of sodium and chlorine?

824 g

For the reaction represented by the equation Mg + 2HCl => H2 + MgCl2, calculate the percentage yield of magnesium chloride if 100. g of magnesium react with excess hydrochloric acid to yield 330. g of magnesium

84.2%

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

9.0 mol

What is the measured amount of a product obtained from a chemical reaction?

actual yield

To determine the limiting reactant in a chemical reaction, one must know the

available amount of each reactant

If one knows the mole ratio of a reactant and product in a chemical reaction, one can

calculate the mass of the product produced form a know mass of reactant

To balance a chemical equation, it may be necessary to adjust the

coefficients

A determination of the masses and the number of moles of sulfur and oxygen in the compound sulfur dioxide would be studied in

composition stoichiometry

The units of molar are

g/mol

In most chemical reactions the amount of product obtained is

less then the theoretical yield

Each of the four types of reaction stoichiometry problems requires using a

mole ratio

In the chemical reaction represented by the equation wA + xB => yC + zD, a comparison of the number of moles of A to the numer of moles of C would be a(n)

mole ratio

A chemist interested in the efficiency of a chemical reaction would calculate the

percentage yield

What is the study of the mass relationships among reactants and products in a chemical reaction?

reaction stoichiometry

The coefficients in a chemical equation represent the

relative numbers of moles of reactants and products

If the percentage yield is equal to 100% then

the actual yield is equal to the theoretical yield

In the chemical equation wA + xB => yC + zD, if one knows the mass of A and the molar masses of A, B, C and D, one can determine

the mass of any of the reactants or products

Which of the following would be investigated in reaction stoichiometry?

the mass of potassium required to produce a known mass of potassium chloride

To determine the limiting reactant in a chemical reaction involving known masses of A and B, one could first calculate

the number of moles of B and the number of moles of A available

What is the maximum possible amount of product obtained in a chemical reaction?

theoretical yield