CHEM 101 Final – A+ Graded Paper | Covers
Atoms, Reactions, Stoichiometry & More
The correct scientific notation for the number 0.00050210 is: - ✔✔5.0210 x 10-4
Which measurement below represents the heaviest mass? - ✔✔1 Mg
Determine the answer to the following equation with correct number of significant figures:
2.02+8.102-0.0297= - ✔✔10.09
A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the
ball? - ✔✔4.82 mL
When the value 4.449 is rounded to two significant figures, the number should be reported
as: - ✔✔4.4
The correct number of significant figures in the number 865,000 is: - ✔✔ambiguous
How many inches are in 2.80 ft? - ✔✔33.6
Which of the following would NOT be considered a correct conversion factor? - ✔✔1 pair of
shoes = 1 shoe
Suppose a boat engine leaks 938 mL of oil into a lake. The mass of this spilled oil is 823 g. The
oil will not mix with the lake water. Which statement is true? - ✔✔The oil will float because
its density of 0.877 g/mL is less than the density of water.
Which state of matter has indefinite shape and is compressible? - ✔✔gas
A solution is an example of a (an): - ✔✔homogeneous mixture
, Which of the following is NOT an example of a physical property? - ✔✔Water can form
hydrogen and oxygen under electrolysis conditions.
Which of the following is a homogeneous mixture? - ✔✔stainless steel
When methane is burned with oxygen the products are carbon dioxide and water. If you
produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how
many grams of oxygen were needed for the reaction? - ✔✔64
What is the definition of a scientific theory? - ✔✔a model that explains the underlying reasons
for observations and laws
What term best describes a brief statement that summarizes many past observations and
predicts new ones? - ✔✔scientific law
Which of the following is an example of a scientific law? - ✔✔In a chemical reaction, matter
is neither created nor destroyed.
Which of the following would be considered a theory? - ✔✔Helium balloons float because
helium is less dense than air.
The key to success in chemistry is: - ✔✔all of the above
A plastic block has dimensions of 2.2 cm x 3.0 cm x 1.5 cm and a mass of 12.4 grams. Will the
block float in water and why? - ✔✔No, because the density of the block is 1.3 g/mL which is
greater than the density of water.
Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with
the dimensions of 10.0 in x 4.00 in x 3.00 in. - ✔✔3.80 x 104
The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m.
Express this distance in scientific notation. - ✔✔1.72 x 10-10 m
Atoms, Reactions, Stoichiometry & More
The correct scientific notation for the number 0.00050210 is: - ✔✔5.0210 x 10-4
Which measurement below represents the heaviest mass? - ✔✔1 Mg
Determine the answer to the following equation with correct number of significant figures:
2.02+8.102-0.0297= - ✔✔10.09
A lead ball has a mass of 55.0 grams and a density of 11.4 g/cm3. What is the volume of the
ball? - ✔✔4.82 mL
When the value 4.449 is rounded to two significant figures, the number should be reported
as: - ✔✔4.4
The correct number of significant figures in the number 865,000 is: - ✔✔ambiguous
How many inches are in 2.80 ft? - ✔✔33.6
Which of the following would NOT be considered a correct conversion factor? - ✔✔1 pair of
shoes = 1 shoe
Suppose a boat engine leaks 938 mL of oil into a lake. The mass of this spilled oil is 823 g. The
oil will not mix with the lake water. Which statement is true? - ✔✔The oil will float because
its density of 0.877 g/mL is less than the density of water.
Which state of matter has indefinite shape and is compressible? - ✔✔gas
A solution is an example of a (an): - ✔✔homogeneous mixture
, Which of the following is NOT an example of a physical property? - ✔✔Water can form
hydrogen and oxygen under electrolysis conditions.
Which of the following is a homogeneous mixture? - ✔✔stainless steel
When methane is burned with oxygen the products are carbon dioxide and water. If you
produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how
many grams of oxygen were needed for the reaction? - ✔✔64
What is the definition of a scientific theory? - ✔✔a model that explains the underlying reasons
for observations and laws
What term best describes a brief statement that summarizes many past observations and
predicts new ones? - ✔✔scientific law
Which of the following is an example of a scientific law? - ✔✔In a chemical reaction, matter
is neither created nor destroyed.
Which of the following would be considered a theory? - ✔✔Helium balloons float because
helium is less dense than air.
The key to success in chemistry is: - ✔✔all of the above
A plastic block has dimensions of 2.2 cm x 3.0 cm x 1.5 cm and a mass of 12.4 grams. Will the
block float in water and why? - ✔✔No, because the density of the block is 1.3 g/mL which is
greater than the density of water.
Given the density of Au is 19.3 g/cm3, determine the mass of gold (in grams) in an ingot with
the dimensions of 10.0 in x 4.00 in x 3.00 in. - ✔✔3.80 x 104
The distance between the two hydrogen atoms in a molecule of water is 0.000000000172 m.
Express this distance in scientific notation. - ✔✔1.72 x 10-10 m
