STRAIGHTERLINE CHEMISTRY FINAL EXAM QUESTIONS AND CORRECT DETAILED / VERIFIED ANSWERS LATEST UPDATE

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STRAIGHTERLINE
CHEMISTRY FINAL EXAM
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QUESTIONS AND CORRECT
DETAILED / VERIFIED
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ANSWERS LATEST UPDATE
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,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




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b. Hypothesis
c. Theory
d. Phenomena




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e. Prediction - ANS b. Hypothesis

If a liquid contains 60% sugar and 40% water throughout its composition then what is it called?




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Select one:
a. Solute
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
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e. Solvent - ANS c. Homogeneous mixture

Which of the following does not have a uniform composition throughout?
Select one:
a. Element
b. Compound
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c. Homogeneous mixture
d. Heterogeneous mixture
e. Solvent - ANS d. Heterogeneous mixture
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Which one of these represents a physical change?
Select one:
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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)
Select one:
a. 58 cm3
b. 1.7 x 105 cm3
c. 90 cm3
d. 3.4 cm3




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e. 34 cm3 - ANS a. 58 cm3

Given that 1 inch = 2.54 cm, 1.00 cm3 is equal to




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Select one:
a. 16.4 in3
b. 6.45 in3




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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?
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Select one:
a. Isotope number
b. Mass number
c. Mass-to-charge ratio
d. Atomic number
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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
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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.




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The 80Br- ion has




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Select one:
a. 45 protons, 35 neutrons, 45 electrons.
b. 35 protons, 45 neutrons, 34 electrons.




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c. 35 protons, 45 neutrons, 36 electrons.
d. 45 protons, 35 neutrons, 46 electrons.
e. 35 protons, 45 neutrons, 46 electrons. - ANS e. 35 protons, 45 neutrons, 46 electrons.

The formula for sodium sulfide is
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Select one:
a. NaS
b. K2S
c. NaS2
d. Na2S
e. SeS - ANS d. Na2S
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Which one of the following formulas of ionic compounds is the least likely to be correct?
Select one:
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a. NH4Cl
b. Ba(OH)2
c. Na2SO4
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d. Ca2NO3
e. Cu(CN)2 - ANS d. Ca2NO3

What is the name of ClO - ion?
Select one:
a. hypochlorite
b. chlorate
c. chlorite
d. perchlorate
e. perchlorite - ANS a. hypochlorite