CMAC Chapter 3 Practice and Review
Exam-Graded A
Chemical - ANS-Physical or Chemical Property? Tarnished Silver
Physical - ANS-Physical or Chemical Property? Sheet of Copper pounded into a bowl
Physical - ANS-Physical or Chemical Property? Barium melts at 725° C
Chemical - ANS-Physical or Chemical Property? Helium does not react with any other
element
Physical - ANS-Physical or Chemical Property? A bar of lead is more easily bent than a
bar of aluminum of the same size
Chemical - ANS-Physical or Chemical Property? Potassium metal is kept submerged in
oil to prevent contact with oxygen or water
The tube will have a mass of 18.48 g, the same mass it had before the reaction. The
tube was sealed, and no mass is lost or gained in a chemical reaction - ANS-A sealed
glass tube contains 2.25 g of copper and 3.32 g of sulfur. The mass of the tube and its
contents is 18.48 g. Upon heating, a reaction forms copper(II) sulfide (CuS). All of the
copper reacts, but only 1.14 g of sulfur reacts. Predict what the mass of the tube and its
contents will be after the reaction is completed. Explain your reasoning
4.73 g - ANS-When heated, calcium hydroxide and ammonium chloride react to
produce ammonia gas, water vapor, and solid calcium chloride. Suppose 5.00 g of
calcium hydroxide and 10.00 g of ammonium chloride are mixed in a test tube and
heated until no more ammonia is given off. The remaining material in the test tube has a
mass of 10.27 g. What total mass of ammonia and water vapor was produced in the
reaction?
12.05 g barium nitrate - ANS-When a solution of barium nitrate and a solution of copper
(II) sulfate are mixed, a chemical reaction produces solid barium sulfate, which sinks to
the bottom, and a solution of copper (II) nitrate. Suppose some barium nitrate is
dissolved in 120.00 g of water and 8.15 g of copper (II) sulfate is dissolved in 75.00 g of
water. The solutions are poured together, and a white solid forms. After the solid is
filtered off, it is found to have a mass of 10.76 g. The mass of the solution that passed
through the filter is 204.44 g. What mass of barium nitrate was used in the reaction?
, 33.38 g sodium chloride - ANS-A reaction between sodium hydroxide and hydrogen
chloride produces sodium chloride and water. A reaction of 22.85 g of sodium hydroxide
with 20.82 g of hydrogen chloride gives off 10.29 g of water. What mass of sodium
chloride is formed in the reaction?
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
70% isopropyl rubbing alcohol
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
A pile of rusty iron filings
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
concrete
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
saltwater
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
gasoline
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
bread
compound - ANS-Element of Compound?
sucrose (table sugar)
element - ANS-Element of Compound?
the helium in a balloon
compound - ANS-Element of Compound?
baking soda
element - ANS-Element of Compound?
a diamond
element - ANS-Element of Compound?
aluminum foil
element - ANS-Element of Compound?
the substances listed on the periodic table
compound - ANS-Element of Compound?
calcium chloride pellets used to melt ice
Exam-Graded A
Chemical - ANS-Physical or Chemical Property? Tarnished Silver
Physical - ANS-Physical or Chemical Property? Sheet of Copper pounded into a bowl
Physical - ANS-Physical or Chemical Property? Barium melts at 725° C
Chemical - ANS-Physical or Chemical Property? Helium does not react with any other
element
Physical - ANS-Physical or Chemical Property? A bar of lead is more easily bent than a
bar of aluminum of the same size
Chemical - ANS-Physical or Chemical Property? Potassium metal is kept submerged in
oil to prevent contact with oxygen or water
The tube will have a mass of 18.48 g, the same mass it had before the reaction. The
tube was sealed, and no mass is lost or gained in a chemical reaction - ANS-A sealed
glass tube contains 2.25 g of copper and 3.32 g of sulfur. The mass of the tube and its
contents is 18.48 g. Upon heating, a reaction forms copper(II) sulfide (CuS). All of the
copper reacts, but only 1.14 g of sulfur reacts. Predict what the mass of the tube and its
contents will be after the reaction is completed. Explain your reasoning
4.73 g - ANS-When heated, calcium hydroxide and ammonium chloride react to
produce ammonia gas, water vapor, and solid calcium chloride. Suppose 5.00 g of
calcium hydroxide and 10.00 g of ammonium chloride are mixed in a test tube and
heated until no more ammonia is given off. The remaining material in the test tube has a
mass of 10.27 g. What total mass of ammonia and water vapor was produced in the
reaction?
12.05 g barium nitrate - ANS-When a solution of barium nitrate and a solution of copper
(II) sulfate are mixed, a chemical reaction produces solid barium sulfate, which sinks to
the bottom, and a solution of copper (II) nitrate. Suppose some barium nitrate is
dissolved in 120.00 g of water and 8.15 g of copper (II) sulfate is dissolved in 75.00 g of
water. The solutions are poured together, and a white solid forms. After the solid is
filtered off, it is found to have a mass of 10.76 g. The mass of the solution that passed
through the filter is 204.44 g. What mass of barium nitrate was used in the reaction?
, 33.38 g sodium chloride - ANS-A reaction between sodium hydroxide and hydrogen
chloride produces sodium chloride and water. A reaction of 22.85 g of sodium hydroxide
with 20.82 g of hydrogen chloride gives off 10.29 g of water. What mass of sodium
chloride is formed in the reaction?
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
70% isopropyl rubbing alcohol
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
A pile of rusty iron filings
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
concrete
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
saltwater
homogeneous - ANS-Homogeneous or Heterogeneous mixture?
gasoline
heterogeneous - ANS-Homogeneous or Heterogeneous mixture?
bread
compound - ANS-Element of Compound?
sucrose (table sugar)
element - ANS-Element of Compound?
the helium in a balloon
compound - ANS-Element of Compound?
baking soda
element - ANS-Element of Compound?
a diamond
element - ANS-Element of Compound?
aluminum foil
element - ANS-Element of Compound?
the substances listed on the periodic table
compound - ANS-Element of Compound?
calcium chloride pellets used to melt ice
