CHEM 121 FINAL PAPER EXAM QUESTIONS ACCURATE ANSWERS FULL SOLUTION
CHEM 121 Final EXAM Questions and Answers
Verified Solutions Latest Update 2026/2027
Question:
An element cannot ________.
Answer:
be separated into other substances by chemical means
Question:
Which of the following is an illustration of the law of constant composition?
Answer:
Water is 11% hydrogen and 89% oxygen by mass.
Question:
Which one of the following is often easily separated into its components by simple techniques such
as filtering or decanting?
Answer:
heterogeneous mixture
Question:
The internal color change of leaves by plants in the fall season is considered to be an example of
what type of process in the properties of matter?
Answer:
chemical change
Question:
,When we say that the melting point of lead is higher than that of aluminium, are we talking about an
extensive or intensive property?
Answer:
intensive
Question:
Is the separation method used in brewing a cup of coffee best described as distillation, filtration, or
chromatography?
Answer:
filtration
Question:
Which separation method is better suited for separating a solution of salt and water into pure
substances, filtration or distillation?
Answer:
distillation
Question:
Which change will lead to a larger change in the kinetic energy of an object, doubling its mass or
doubling its speed?
Answer:
doubling its speed
Question:
A roller coaster is brought from the starting point to the peak of the first rise at 100 off the ground.
potential energy increase or decrease?
Answer:
increase
, Question:
A bond in an ozone molecule, O3, is broken to form an oxygen radical and an oxygen molecule.
Potential energy increase or decrease?
Answer:
increase
Question:
The distance between two positively charged particles is decreased. Potential energy increase or
decrease?
Answer:
increase
Question:
3.2 cm3 = 0.0032 L. true or false?
Answer:
false
Question:
Express the temperature, 392.66 K, in degrees Celsius.
Answer:
119.51 °C
Question:
The temperature of -107 °C is ________ in kelvins.
Answer:
166
CHEM 121 Final EXAM Questions and Answers
Verified Solutions Latest Update 2026/2027
Question:
An element cannot ________.
Answer:
be separated into other substances by chemical means
Question:
Which of the following is an illustration of the law of constant composition?
Answer:
Water is 11% hydrogen and 89% oxygen by mass.
Question:
Which one of the following is often easily separated into its components by simple techniques such
as filtering or decanting?
Answer:
heterogeneous mixture
Question:
The internal color change of leaves by plants in the fall season is considered to be an example of
what type of process in the properties of matter?
Answer:
chemical change
Question:
,When we say that the melting point of lead is higher than that of aluminium, are we talking about an
extensive or intensive property?
Answer:
intensive
Question:
Is the separation method used in brewing a cup of coffee best described as distillation, filtration, or
chromatography?
Answer:
filtration
Question:
Which separation method is better suited for separating a solution of salt and water into pure
substances, filtration or distillation?
Answer:
distillation
Question:
Which change will lead to a larger change in the kinetic energy of an object, doubling its mass or
doubling its speed?
Answer:
doubling its speed
Question:
A roller coaster is brought from the starting point to the peak of the first rise at 100 off the ground.
potential energy increase or decrease?
Answer:
increase
, Question:
A bond in an ozone molecule, O3, is broken to form an oxygen radical and an oxygen molecule.
Potential energy increase or decrease?
Answer:
increase
Question:
The distance between two positively charged particles is decreased. Potential energy increase or
decrease?
Answer:
increase
Question:
3.2 cm3 = 0.0032 L. true or false?
Answer:
false
Question:
Express the temperature, 392.66 K, in degrees Celsius.
Answer:
119.51 °C
Question:
The temperature of -107 °C is ________ in kelvins.
Answer:
166
