CHEM121 –EXAM QUESTIONS AND
EXPECTED ANSWERS
Classify the following as a homogeneous mixture,
element, heterogeneous mixture, or compound:
Two phases each containing the same triatomic,
homoatomic molecule.
element
Classify the following as a homogeneous mixture,
element, heterogeneous mixture, or compound:
3 phases present, each phase contains a different
homoatomic molecule.
heterogeneous mixture
A beaker is marked by 1000 's. If the beaker is filled
with mango juice so that the meniscus sits on the
2000 mL mark, what is the correct measurement of the
juice?
2.0 x 10^3 mL
Please give the answer to the following calculation of
two measurements using the correct number of
significant figures:
45,100 + 100,093
145100
A patient requires medication at a rate of 3.30 nl/hr.
How fast should the medication be delivered in
ml/second?
9.17 x 10^-10 mL/second
What is the name of Fe2(SO3
iron (III) sulfite
EXPECTED ANSWERS
Classify the following as a homogeneous mixture,
element, heterogeneous mixture, or compound:
Two phases each containing the same triatomic,
homoatomic molecule.
element
Classify the following as a homogeneous mixture,
element, heterogeneous mixture, or compound:
3 phases present, each phase contains a different
homoatomic molecule.
heterogeneous mixture
A beaker is marked by 1000 's. If the beaker is filled
with mango juice so that the meniscus sits on the
2000 mL mark, what is the correct measurement of the
juice?
2.0 x 10^3 mL
Please give the answer to the following calculation of
two measurements using the correct number of
significant figures:
45,100 + 100,093
145100
A patient requires medication at a rate of 3.30 nl/hr.
How fast should the medication be delivered in
ml/second?
9.17 x 10^-10 mL/second
What is the name of Fe2(SO3
iron (III) sulfite
