Chapter 9 Questions (Set #2)

2Na + 2H2O --> 2NaOH, how many grams of hydrogen are produced if 120 g of sodium and 80 g of water are available

4.5 g

2KClO3 --> 2KCl + 3O2, how many moles of oxygen are produced when 3 mol of KCl3 decompose completely

4.5 mol

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

4:3

CH4 + 2O2 --> 2H2O + CO2, calculate the percent yield of carbon dioxide if 1000 g of methane react with excess oxygen to produce 2300 g of carbon dioxide

83.88%

CH4 + 2O2 --> 2H2O + CO2, calculate the percentage yield of carbon dioxide if 1000 g of methane react w/ excess oxygen to produce 2300 g of carbon dioxide

83.9%

N2 + 3H2 --> 2NH3, how many moles of nitrogen are required to produce 18 mol of ammonia

9 mol

2Na + 2H2O --> 2NaOh + H2, calculate the percent yield if 80 g of water react w/ excess sodium to produce 4.14 g of hydrogen

92 %

SO3 + H2O --> H2SO4, calculate the percent yield is 500 g of sulfur trioxide react w/ excess water to produce 575 g of sulfuric acid

93.9%

a chemical reaction involving substance A and B stops when B is completely used. B is the

limiting reactant

the coefficients in a chemical equation represent the

relative numbers of moles of reactants and products

which branch of chemistry deals with the mass relationships of elements in compounds and the mass relationships among reactants and products in chemical reactions

stoichiometry

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

theoretical yield

would this be investigated in stoichiometry?: the mass of potassium required to produce a known mass of potassium chloride

yes

2H2 + O2 --> 2H2O, how many grams of water are produced from 6 mol of hydrogen

108 g

2H2 + O2 --> 2H2O, how many moles of water can be produced from 6 mol of oxygen

12 mol

2Zn + O2 --> 2ZnO, how many grams of zinc oxide can be produced from 1 g each of zinc and oxygen

124 g

for the reaction Cl2 + 2KBr --> 2KCl + Br2, how many grams of potassium chloride can be produced from 300 g each of chlorine and potassium bromide

188 g

N2 + 3H2 --> 2NH3, what is the mole ratio of nitrogen to ammonia

1:2

Pb(NO3)2 + 2KI --> PbI2 +2KNO3, how many moles of lead iodide are produced from 300 g of potassium iodide

.903 mol

Cl2 + 2KBr --> @kCl + Br2, how many moles of potassium chloride are produced from 119 g of potassium bromide

1 mol

SO 3 + H2O --> H2SO4, how many grams of sulfuric acid can be produced from 200 g of sulfur trioxide and 100 g of water

245 g

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

C + H2 --> CH4, what is the mole ratio of hydrogen to methane

2:1

3Fe + 4H2O --> Fe3O4 + 4H2, how many moles of iron oxide are produced from 500 g of iron

3 mol

for the reaction SO3 + H2O --> H2SO4, how many grams of sulfur trioxide are required to produce 4 mol of sulfuric acid

320 g

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

CH4 + O2 --> CO2, how many moles of carbon dioxide are produced from the combustion of 100 g of methane

6.23 mol

2Na +Cl2 --> 2NaCl, how many grams of chlorine ware required to react completely with 2 mol of sodium

70.9 g

2Na + Cl2 --> 2NaCl, how many grams of sodium chloride can be produced from 500 g each of sodium and chlorine

824 g

wA + wB --> yC + zD, a comparison of the number of moles of A to the number of moles of C would be a

mole ratio