Chapter 9

In the reaction represented by the equation 2AlO3 --> 4Al + 3O2 what is the mole to mole ratio of aluminum to oxygen?

4:3

For the reaction represented by the equation 2Na + Cl --> 2NaCl how many grams of chlorine gas are required to react completely with 2 mol of sodium?

70.9 g

When the limiting reactant in a chemical reaction is completely used, the?

Reaction stops

In the chemical reaction represented by the equation wA + xB --> yC + zD, a comparison of the number of moles of A to the moles of C would be?

mole ratio

For the reaction represented by the equation 2H2 + O2 --> 2H2O how many grams of water are produced from 6 mol of hydrogen?

108 g

In the reaction by the equation N2 +3H2 --> 2NH3 what is the mole to mole ratio of nitrogen to ammonia?

1:2

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

2.98 mol

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 hrydrochloric acid to yield 330 g of magnesium chloride?

84.2%

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

9 mol

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

Actual yield

For the reaction 2Na + 2H2O → 2NaOH + H2, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available?

4.5 g

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

4.5 mol

For the reaction represented by N2 + Cl2 --> 2NaCl how many grams of sodium chloride can be produced from 500 g each of sodium and chlorine?

824g

What is the study of the mass relationships of elements in compounds?

Composition stoichiometry

What is the ratio of the actual yield to the theoretical yield multiplied by 100%?

Percentage yield

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

Reaction Stoichiometry

In most chemical reactions the amount of product obtained is?

less than the theoretical yield