CHEM 1305 TTU EXAM 3 EXAMPREP 2026
COMPLETE QUESTIONS AND ANSWERS
ALREADY PASSED
◉ What is the term for the substance in a chemical reaction that
controls the maximum amount of product? (ch. 9).
Answer: limiting reactant
◉ What term refers to the amount of product experimentally
measured in a laboratory procedure? (ch. 9).
Answer: actual yield
◉ What is the term for the amount of product calculated to be
obtained from a given amount of reactant? (ch. 9).
Answer: theoretical yield
◉ What term is an expression for the amount of the actual yield
compared to the theoretical yield? (ch. 9).
Answer: percent yield
◉ How many moles of carbon monoxide react with 1 mol of oxygen
gas according to the balanced chemical equation?
,D
2 CO(g) + O2(g) -> 2 CO2(g) (ch. 9).
Answer: 2 mol
◉ Assuming similar conditions, how many liters of carbon monoxide
gas react to produce 2 L of carbon dioxide gas?
D
2 CO(g) + O2(g) -> 2 CO2(g) (ch. 9).
Answer: 2 L
◉ In an experiment, 5.585 g of iron metal reacts with 3.207 g of
yellow sulfur. Using the conservation of mass law, predict the mass
of product.
D
Fe(s) + S(s) -> FeS(s) (ch. 9).
Answer: 8.792 g
◉ In an experiment, 0.520 g of chromium metal reacts with 3.807 g
of iodine. Using the conservation of mass law, predict the mass of
product.
D
2 Cr(s) + 3 I2(s) -> 2 CrI3(s) (ch. 9).
Answer: 4.327 g
, ◉ How many moles of hydrogen iodide are produced from 1.00 mol
of iodine?
D
__H2(g) + __I2(g) -> __HI(g) (ch. 9).
Answer: 2.00 mol
◉ How many moles of oxygen gas react with 0.100 mol of pentane,
C5H12?
spark
__C5H12 (g) + __O2(g) -> __CO2(g) + __H2O(g) (ch. 9).
Answer: 0.800 mol
◉ What is the mass of aluminum oxide (101.96 g/mol) produced
from 3.59 g of iron(II) oxide (71.85 g/mol)?
D
__FeO(l) + __Al(l) -> __Fe(l) + __Al2O3(l) (ch. 9).
Answer: 1.70 g
◉ What is the volume of oxygen gas at STP from the decomposition
of 1.70 g of sodium nitrate (85.00 g/mol)?
D
__NaNO3(s) -> __NaNO2(s) + __O2(g) (ch. 9).
COMPLETE QUESTIONS AND ANSWERS
ALREADY PASSED
◉ What is the term for the substance in a chemical reaction that
controls the maximum amount of product? (ch. 9).
Answer: limiting reactant
◉ What term refers to the amount of product experimentally
measured in a laboratory procedure? (ch. 9).
Answer: actual yield
◉ What is the term for the amount of product calculated to be
obtained from a given amount of reactant? (ch. 9).
Answer: theoretical yield
◉ What term is an expression for the amount of the actual yield
compared to the theoretical yield? (ch. 9).
Answer: percent yield
◉ How many moles of carbon monoxide react with 1 mol of oxygen
gas according to the balanced chemical equation?
,D
2 CO(g) + O2(g) -> 2 CO2(g) (ch. 9).
Answer: 2 mol
◉ Assuming similar conditions, how many liters of carbon monoxide
gas react to produce 2 L of carbon dioxide gas?
D
2 CO(g) + O2(g) -> 2 CO2(g) (ch. 9).
Answer: 2 L
◉ In an experiment, 5.585 g of iron metal reacts with 3.207 g of
yellow sulfur. Using the conservation of mass law, predict the mass
of product.
D
Fe(s) + S(s) -> FeS(s) (ch. 9).
Answer: 8.792 g
◉ In an experiment, 0.520 g of chromium metal reacts with 3.807 g
of iodine. Using the conservation of mass law, predict the mass of
product.
D
2 Cr(s) + 3 I2(s) -> 2 CrI3(s) (ch. 9).
Answer: 4.327 g
, ◉ How many moles of hydrogen iodide are produced from 1.00 mol
of iodine?
D
__H2(g) + __I2(g) -> __HI(g) (ch. 9).
Answer: 2.00 mol
◉ How many moles of oxygen gas react with 0.100 mol of pentane,
C5H12?
spark
__C5H12 (g) + __O2(g) -> __CO2(g) + __H2O(g) (ch. 9).
Answer: 0.800 mol
◉ What is the mass of aluminum oxide (101.96 g/mol) produced
from 3.59 g of iron(II) oxide (71.85 g/mol)?
D
__FeO(l) + __Al(l) -> __Fe(l) + __Al2O3(l) (ch. 9).
Answer: 1.70 g
◉ What is the volume of oxygen gas at STP from the decomposition
of 1.70 g of sodium nitrate (85.00 g/mol)?
D
__NaNO3(s) -> __NaNO2(s) + __O2(g) (ch. 9).
