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STRAIGHTERLINE CHEMISTRY Final Exam
2025 | Actual Questions With Answers | A+
Guide Solution
What is the term used for findings that are summarized based on a pattern or
trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction -correct-answer-a. Law
Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction -correct-answer-b. Hypothesis
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If a liquid contains 60% sugar and 40% water throughout its composition then
what is it called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent -correct-answer-c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent -correct-answer-d. Heterogeneous mixture
Which one of these represents a physical change?
Select one:
a. Water, when heated, forms steam.
b. Bleach turns hair yellow.
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c. Sugar, when heated, becomes brown.
d. Milk turns sour.
e. Apples, when exposed to air, turn brown. -correct-answer-a. Water, when
heated, forms steam.
How many micrograms are in 65.3 kg?
Select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg -correct-answer-e. 6.53 × 1010 μg
A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0
millimeters (depth). What is the volume of the smart phone in cubic centimeters?
(1 in = 2.54 cm)
Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3 -correct-answer-a. 58 cm3
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Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
Select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 -correct-answer-e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-
12 atom?
Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
e. Atomic mass unit -correct-answer-e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
STRAIGHTERLINE CHEMISTRY Final Exam
2025 | Actual Questions With Answers | A+
Guide Solution
What is the term used for findings that are summarized based on a pattern or
trend?
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction -correct-answer-a. Law
Which of the following is a tentative explanation for a set of observations?
Select one:
a. Law
b. Hypothesis
c. Theory
d. Phenomena
e. Prediction -correct-answer-b. Hypothesis
,2|Page
If a liquid contains 60% sugar and 40% water throughout its composition then
what is it called?
Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent -correct-answer-c. Homogeneous mixture
Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent -correct-answer-d. Heterogeneous mixture
Which one of these represents a physical change?
Select one:
a. Water, when heated, forms steam.
b. Bleach turns hair yellow.
,3|Page
c. Sugar, when heated, becomes brown.
d. Milk turns sour.
e. Apples, when exposed to air, turn brown. -correct-answer-a. Water, when
heated, forms steam.
How many micrograms are in 65.3 kg?
Select one:
a. 0.653 μg
b. 6.53 × 107 μg
c. 6.53 × 104 μg
d. 6.53 × 10-8 μg
e. 6.53 × 1010 μg -correct-answer-e. 6.53 × 1010 μg
A smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0
millimeters (depth). What is the volume of the smart phone in cubic centimeters?
(1 in = 2.54 cm)
Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3 -correct-answer-a. 58 cm3
, 4|Page
Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to
Select one:
a. 16.4 in3
b. 6.45 in3
c. 0.394 in3
d. 0.155 in3
e. 0.0610 in3 -correct-answer-e. 0.0610 in3
What terms defines a mass which is exactly equal to 1/12 the mass of one carbon-
12 atom?
Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
e. Atomic mass unit -correct-answer-e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass number is 208?
