MULTIPLE CHOICE
1. There are two different common crystalline forms of carbondiamond and graphite. A less common
form called fullerene, C60, also exists. Different forms of the same element in the same physical state
...
MULTIPLE CHOICE
1. There are two different common crystalline forms of carbondiamond and graphite. A less common
form called fullerene, C60, also exists. Different forms of the same element in the same physical state
are called:
a. isotopes.
b. isomers.
c. alloforms.
d. allotropes.
e. structural formulas.
ANS: D
OBJ: Define allotrope.
TOP: Chemical Formulas
2. How many atoms are in a sulfuric acid molecule?
a. 1
b. 7
c. 5
d. 6
e. 8
ANS: B
OBJ: Know the chemical formulae of common acids.
TOP: Chemical Formulas
3. If a sample of butane, C4H10, contains a total of 8.0 103
atoms of carbon, how many molecules of
butane are in the sample?
a. 6.0 103
b. 3.0 103
c. 8.0 103
d. 1.1 104
e. 2.0 103
ANS: E
OBJ: Understand the relationship between molecular formula and the number of atoms of a specific
type contained in a single compound. | Convert the number of atoms in a substance to the number of
molecules in a substance.
TOP: Chemical Formulas
4. Name the molecular compound, HNO3.
a. ammonia
b. nitric acid
c. nitrous acid
d. nitric oxide
e. methane
ANS: B
OBJ: Know the names and chemical formulae of common acids.
TOP: Chemical Formulas
Whitten 10e Test Bank
5. Name the molecular compound, SO3.
a. sulfur oxide
b. sulfurous acid
c. sulfur trioxide
d. sulfuric acid
e. none of these
ANS: C
OBJ: Translate the chemical formula of a binary molecule into a name.
TOP: Chemical Formulas
6. Which formula / name pair does not match?
a. HNO3 / nitric acid, used to produce explosives
b. CH3OH / methyl alcohol, wood alcohol
c. CH3CH2OH / ethyl alcohol, alcohol in wine
d. CHCl3 / acetic acid, found in vinegar
e. CH3CH2OCH2CH3 / diethyl ether, an anesthetic
ANS: D
OBJ: Know the names and chemical formulae of common acids. | Recognize the names and chemical
formulae of common organic compounds.
TOP: Chemical Formulas
7. Name the molecular compound, CH3COCH3.
a. acetone
b. ethanol
c. diethyl ether
d. propane
e. ethyl alcohol
ANS: A
OBJ: Know the names and chemical formulae of common organic compounds.
TOP: Chemical Formulas
8. What is the molecular formula for ethanol?
a. CH3COOH
b. CH3COCH3
c. CH3CH2OCH2CH3
d. CH3CH2CO2H
e. CH3CH2OH
ANS: E
OBJ: Know the names and chemical formulae of common organic compounds.
TOP: Chemical Formulas
9. Butane, a highly combustible hydrocarbon found in disposable lighters, has the chemical formula:
a. CO2
b. C4H8
c. C4H10
d. C3H8
e. CH3OCH3
Whitten 10e Test Bank
ANS: C
OBJ: Know the names and chemical formulae of common organic compounds. | Translate the
chemical formula of a binary molecule into a name.
TOP: Chemical Formulas
10. What is the molecular formula for hydrogen chloride?
a. HCl
b. HClO
c. HClO2
d. HClO3
e. HClO4
ANS: A
OBJ: Know the names and chemical formulae of common acids.
TOP: Chemical Formulas
11. A compound contains only calcium and fluorine. A sample of the compound is determined to contain
2.00 g of calcium and 1.90 g of fluorine. According to the Law of Definite Proportions, how much
calcium should another sample of this compound contain if it contains 2.85 g of fluorine?
a. 2.71 g
b. 4.00 g
c. 3.00 g
d. 4.50 g
e. 6.00 g
ANS: C
OBJ: Apply the Law of Definite Proportions.
TOP: Chemical Formulas
12. A compound contains only magnesium and oxygen. A sample of the compound is determined to
contain 3.50 g of magnesium and 2.30 g of oxygen. According to the Law of Definite Proportions, how
much magnesium should another sample of this compound contain if it contains 6.91 g of oxygen?
a. 1.16 g
b. 10.5 g
c. 4.54 g
d. 55.5 g
e. 0.858 g
ANS: B
OBJ: Apply the Law of Definite Proportions.
TOP: Chemical Formulas
13. Which of the following is not the name of a cation?
a. sodium
b. iron (III)
c. magnesium
d. sulfide
e. ammonium
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