Exam (elaborations)

Test Bank for Chemical Principles, 8th Edition

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Physiology

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University Of Toronto (U Of T )

Test Bank for Chemical Principles, 8th Edition 1. According to the law of definite proportions, a. the ratio of the masses of the elements in a compound is always the same. b. it is not possible for the same two elements to form more than one compound. c. if the same two elements form two diffe...

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Test Bank for Chemical Principles, 8th Edition,
Steven S. Zumdahl, Donald J. DeCoste

,1. According to the law of definite proportions,
a. the ratio of the masses of the elements in a compound is always the same.
b. it is not possible for the same two elements to form more than one compound.
c. if the same two elements form two different compounds, they do so in the same ratio.
d. the total mass after a chemical change is the same as before the change.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.2
KEYWORDS: compound | general chemistry | general concepts | matter

2. Which of the following pairs of compounds can be used to illustrate the law of multiple proportions?
a. CaO and CaCl2
b. NO and NO2
c. H2S and HBr
d. SiH4 and SiO2
e. NF3 and NCl3
ANSWER: b
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.2
KEYWORDS: compound | general chemistry | general concepts | matter

3. How many of the following did Dalton not discuss in his atomic theory?
I. isotopes
II. ions
III. protons
IV. neutrons
V. electrons
a. 2
b. 5
c. 4
d. 1
e. 3
ANSWER: b
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.3
KEYWORDS: atomic theory of matter | Dalton's atomic theory | early atomic theory | general chemistry

4. When 2.0 L of oxygen gas (O2) reacts with 1.0 L of nitrogen gas (N2), 2.0 L of gaseous product is formed.
All volumes of gases are measured at the same temperature and pressure. What is the formula of the product?

, a. NO
b. NO4
c. N2O3
d. N2O
e. NO2
ANSWER: e
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.4
KEYWORDS: chemical formula | chemical substance | early atomic theory | general chemistry | molecular
substance

5. Which one of the following statements about atomic structure is false?
a. Almost all of the mass of the atom is concentrated in the nucleus.
b. The protons and neutrons in the nucleus are very tightly packed.
c. The number of protons and the number of neutrons are always the same in the neutral atom.
d. The electrons occupy a very large volume compared to the nucleus.
ANSWER: c
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.4
2.5
KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | nuclear structure

6. Which of the experiments listed below did not provide the information stated about the nature of the atom?
a. The Rutherford experiment proved that the Thomson "plum pudding" model of the atom was
essentially correct.
b. The Rutherford experiment determined the charge on the nucleus.
c. The cathode-ray tube proved that electrons have a negative charge.
d. Millikan's oil-drop experiment showed that the charge on any particle was a simple multiple of the
charge on the electron.
ANSWER: a
POINTS: 1
DIFFICULTY: easy
TOPICS: 2.5
KEYWORDS: atomic theory of matter | early atomic theory | general chemistry | structure of the atom

7. Which of the following atomic symbols is incorrect?
a. 3115P
b. 199F
c. 34
17Cl

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