Chem 121 Lab Quiz 1 questions and answers
2025\2026 A+ Grade
Calculate the density of a rock that weighs 4.56 grams and has a volume of 2.88 cm³.
- correct answer 1.58 grams/cm³
A nail weighing 7.88 grams is placed in a graduated cylinder containing 22.35 mL of distilled water.
When the nail is added to the cylinder, the water rises to the 27.63 mL line. Determine the density of
the nail.
- correct answer 1.49 grams/mL
What is the mass of 1000 cm³ (1.000 Liter) of gold? The density of gold is 19.3 grams/cm³.
- correct answer 19300 grams
What is the volume, in cubic centimeters (cm³), of 1.00 kilogram of gold?
- correct answer 51.8 cm³
A perfect cube is 2.00 cm on a side. If this cube weighs 10.0 grams, what is its density?
- correct answer 1.25 grams/cm³
The density of air is 1.29 grams/Liter. What is the weight, in kilograms, of a cubic meter (1.00 m³) of air?
- correct answer 1.29 kg
In the literature, the density of a specific mineral is listed as 3.845 grams/cm³. A student determined its
density to be 3.644 grams/cm³. Determine the student's percent error.
- correct answer ±5.23 % error
The average American dollar bill ($1.00) weighs about 1.00 gram. Five students weighed the same dollar
bill on the same balance. Their results are as follows:
1.040 grams
0.989 grams
, 1.009 grams
1.026 grams
0.999 grams
Determine:
a) the average
b) the average deviation
c) the relative or percentage deviation
- correct answer a) 1.0126 grams
b) 1.0126 grams ± 0.01632
c) 1.0126 ± 1.6117 %
Explain why the experimental density of water may not be the same as the theoretical density of water.
What effect might the temperature of the water have upon the density of water?
- correct answer The water could be hotter than the water for theoretical density as hotter water has
less density than cooler water.
Explain why the density of glass pieces may or may not be identical.
- correct answer Intrinsic property; density is independent of the amount which is why density is
identical no matter the size of the pieces.
Does shape, size, etc. of glass affect its density?
- correct answer Because it's an intrinsic property, density is only affected through temperature and
pressure. The only exception is if altered with defects.
If the market price of gold is $36.00 per gram, a 355 cm³ soda can filled with gold, will have what dollar
value? The density of gold is 19.3 grams/cm³.
- correct answer $247000
Given that the Earth has a diameter of about 13,000 km and weighs 6.00x10²⁴ kilograms, determine the
average density of Earth in grams/cm³. The volume of a sphere equals 4πr³/3, where "r" is the radius,
which is half of the diameter. π = 3.14.
- correct answer 5.18 grams/cm³
2025\2026 A+ Grade
Calculate the density of a rock that weighs 4.56 grams and has a volume of 2.88 cm³.
- correct answer 1.58 grams/cm³
A nail weighing 7.88 grams is placed in a graduated cylinder containing 22.35 mL of distilled water.
When the nail is added to the cylinder, the water rises to the 27.63 mL line. Determine the density of
the nail.
- correct answer 1.49 grams/mL
What is the mass of 1000 cm³ (1.000 Liter) of gold? The density of gold is 19.3 grams/cm³.
- correct answer 19300 grams
What is the volume, in cubic centimeters (cm³), of 1.00 kilogram of gold?
- correct answer 51.8 cm³
A perfect cube is 2.00 cm on a side. If this cube weighs 10.0 grams, what is its density?
- correct answer 1.25 grams/cm³
The density of air is 1.29 grams/Liter. What is the weight, in kilograms, of a cubic meter (1.00 m³) of air?
- correct answer 1.29 kg
In the literature, the density of a specific mineral is listed as 3.845 grams/cm³. A student determined its
density to be 3.644 grams/cm³. Determine the student's percent error.
- correct answer ±5.23 % error
The average American dollar bill ($1.00) weighs about 1.00 gram. Five students weighed the same dollar
bill on the same balance. Their results are as follows:
1.040 grams
0.989 grams
, 1.009 grams
1.026 grams
0.999 grams
Determine:
a) the average
b) the average deviation
c) the relative or percentage deviation
- correct answer a) 1.0126 grams
b) 1.0126 grams ± 0.01632
c) 1.0126 ± 1.6117 %
Explain why the experimental density of water may not be the same as the theoretical density of water.
What effect might the temperature of the water have upon the density of water?
- correct answer The water could be hotter than the water for theoretical density as hotter water has
less density than cooler water.
Explain why the density of glass pieces may or may not be identical.
- correct answer Intrinsic property; density is independent of the amount which is why density is
identical no matter the size of the pieces.
Does shape, size, etc. of glass affect its density?
- correct answer Because it's an intrinsic property, density is only affected through temperature and
pressure. The only exception is if altered with defects.
If the market price of gold is $36.00 per gram, a 355 cm³ soda can filled with gold, will have what dollar
value? The density of gold is 19.3 grams/cm³.
- correct answer $247000
Given that the Earth has a diameter of about 13,000 km and weighs 6.00x10²⁴ kilograms, determine the
average density of Earth in grams/cm³. The volume of a sphere equals 4πr³/3, where "r" is the radius,
which is half of the diameter. π = 3.14.
- correct answer 5.18 grams/cm³
