Chemistry Chapter 9

for the reaction represented by the equation AgNO3+NaCl --> NaNO3+AgCl, how many moles of silver chloride, AgCl, are produced from seven moles of silver nitrate AgNO3?

7.0 moles

according to the equation C3H8+5O2 --> 4H2O, when O2 is in excess, how many grams of carbon dioxide are produced from the combustion of 250 g of ethane, C3H8?

748

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

coefficient

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

composition stoichiometry

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

limiting reactant

Which coefficients correctly balance the formula NH4NO2 --> N2+H2O

1,1,2

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

1:2

for the reaction represented by the equation C+2H2 --> CH4, how many moles of hydrogen are required to produce 10 moles of methane, CH4?

20 moles

In the reaction represented by the equation C+ 2H2 --> CH4, what is the ratio of hydrogen to methane?

2:1

in the reaction represented by the equation 2Na+2H2O --> 2NaOH+H2, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available?

4.48

A balanced chemical equation allows one to determine the

mood ratio of any 2 substances in the reaction

give the correct mathematical expression for determining percentage yield

percentage yield = actual/theoretical • 100

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

reaction stoichiometry

Which brand of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions?

stoichiometry

for the reaction represented by the equation 2H2+O2 --> 2H2O, how many grams of water are produced from six moles of hydrogen?

108 g

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

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

C(s)

Is this balanced? 2H2+O2+H2O

No