Straighterline Chemistry Final Questions and Correct Answers

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Straighterline Chemistry Final Questions and
Correct Answers
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 Ans: — 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 Ans: — b. Hypothesis
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 Ans: — c. Homogeneous mixture

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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 Ans: — d. Heterogeneous mixture
Which one of these represents a physical change?
Select one:
a. Water, when heated, forms steam.
b. Bleach turns hair yellow.
c. Sugar, when heated, becomes brown.
d. Milk turns sour.
e. Apples, when exposed to air, turn brown. Ans: — 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 Ans: — 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)

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Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3
e. 34 cm3 Ans: — a. 58 cm3
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 Ans: — 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 Ans: — e. Atomic mass unit
How many neutrons are there in an atom of lead whose mass
number is 208?




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Select one:
a. 82
b. 126
c. 208
d. 290
e. none of them Ans: — b. 126
Which of these elements is chemically similar to magnesium?


Select one:
a. Sulfur
b. Calcium
c. Iron
d. Nickel
e. Potassium Ans: — b. Calcium
C(graphite) and C(diamond) are examples of:


Select one:
a. isotopes of carbon.
b. allotropes of carbon.
c. the law of definite proportions.
d. different carbon ions. Ans: — b. allotropes of carbon.
The 80Br- ion has


Select one:


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