1. The term that is related to the reproducibility (repeatability) of a measurement is
[A] qualitative.
[B] quantitative.
[C] accuracy.
[D] property.
[E] precision.
2. Which is the smallest mass?
[A] 1000 ng
[B] 1000 g
[C] 1000 g
[D] 1000 mg
[E] 1000 kg
3. The distance from Salt Lake City to San Francisco is 750 miles by car. Which of the following
is a correct setup for that distance in kilometers?
1 in = 2.54 cm
1 mi = 5280 ft
1 ft = 12 in
1 m = 100 cm
1 km = 1000 m
5280 1 2.54 100 1
[A] 750 km
1 12 1 1 1000
12 1 1760 1
[B] 750 km
1 2.54 1 1000
5280 12 1 1 1
[C] 750 km
1 1 2.54 100 1000
12 2.54 1
[D] 750 km
1 1 1000
5280 12 1 2.54 1
[E] 750 km
1 1 100 1 1000
3 3
4. A piece of indium weighing 15.442 g is placed in 49.7 cm of ethyl alcohol (d = 0.798 g/cm )
3
in a graduated cylinder. The alcohol level increases to 51.8 cm . The best value for density of
indium from these data is
3
[A] 7.4 g/cm .
3
[B] 7.35 g/cm .
3
[C] 9.2 g/cm .
3
[D] 7.353 g/cm .
3
[E] 9.21 g/cm .
3 3
5. What is the mass of NH in a 50.0-cm sample that has a density of 0.90 g/cm and which
3
consists of 28% NH ?
3
[A] 13 g
[B] 25 g
[C] 32 g
[D] 45 g
[E] 15 g
6. Two types of pure substances are
[A] elements and heterogeneous solutions.
[B] compounds and homogeneous solutions.
[C] elements and homogeneous solutions.
[D] compounds and elements.
[E] compounds and heterogeneous solutions.
7. All of the following statements are correct EXCEPT
[A] The evaporation of water is a physical change.
[B] The conversion of elements into compounds is a chemical change.
[C] The conversion of compounds into elements is a chemical change.
[D] The conversion of sugar to carbon and water is a chemical change.
[E] The conversion of liquid water to gaseous water is a chemical change.
8. Which of the following is a chemical property of copper?
[A] It melts at 1083C.
[B] It displaces silver ion from an aqueous solution.
[C] Its specific heat is 0.385 J/gC.
[D] It conducts electricity.
3
[E] Its density is 8.96 g/cm .
9. Dalton’s atomic theory consisted of all the following postulates EXCEPT
[A] with gases, the volumes consumed and produced are in ratios of small whole numbers.
[B] elements are composed of indivisible particles called atoms.
[C] atoms of different elements have different properties.
[D] atoms combine in fixed ratios of whole numbers.
[E] in chemical changes, atoms are not destroyed, created, or changed.
10. The number of neutrons in a given nucleus determines the
[A] number of electrons.
[B] number of isotopes.
[C] number of protons.
[D] atomic number.
[E] mass number.
11. Experiments were carried out in which a beam of cathode rays was first bent by a magnetic
field and then bent back by an electrostatic field until the beam hit the screen exactly where it
had been hitting before the fields were applied. This experiment permitted the direct
measurement of
[A] the ratio of mass to charge of an electron.
[B] the mass of the electron.
[C] the mass of the atom.
[D] the charge on the nucleus of an atom.
[E] the charge on the electron.
12. What is the symbol of the species that has 16 protons and 18 electrons?
[A] Ar
18
2
[B] S
16
4
[C] Si
14
2+
[D] S
16
[E] S
16
13. A certain element is listed as having 63.5 atomic mass units. It is probably true that it
contains
[A] a mixture of isomers.
[B] a mixture of allotropes.
[C] a mixture of neutrons.
[D] a mixture of isotopes.
[E] a mixture of ions.
14. An element, X, has the following isotopic composition: X-200, 90%; X-199, 8.0%; and X-
202, 2.0%. Its atomic mass is CLOSEST to
[A] It cannot be determined.
[B] 202 amu.
[C] 199 amu.
[D] 201 amu.
[E] 200 amu.
15. The formulas of the nitrite, phosphide, and nitrate ions are represented, respectively, as
5
[A] NO , P , NO .
3
3
[B] NO , PO , N .
3 2
3
[C] NO , PO , NO .
2 4 4
3
[D] NO , P , NO .
2 3
3 3
[E] N , PO , NO .
3 3
16. How many atoms of carbon are there in 0.40 mole of procaine, C H N O , a “pain killer”
13 20 2 2
used by dentists?
24
[A] 3.1 10
24
[B] 9.6 10
24
[C] 6.3 10
23
[D] 9.6 10
23
[E] 4.8 10
17. How many moles of hexachlorobenzene, C Cl , are there in 3.15 g of C Cl ?
6 6 6 6
[A] 0.0456
[B] 0.0624
[C] 0.0111
[D] 0.0228
[E] 897
18. How many molecules are in 1.0 mg of glucose, C H O ?
6 12 6
18
[A] 3.34 10
24
[B] 3.34 10
21
[C] 3.34 10
21
[D] 2.18 10
18
[E] 2.18 10
19. What is the mass in grams of one carbon dioxide molecule?
23
[A] 4.65 10
[B] 28.0
23
[C] 7.31 10
[D] 44.0
22
[E] 1.37 10
20. What is the percentage of mass of oxygen in vanillin, C8H8O3, which is used as a flavoring?
[A] 27.3%
[B] 68.4%
[C] 63.2%
[D] 31.6%
[E] 45.8%
Reference: [1.1]
[1] [E]
Reference: [1.37]
[2] [A]
Reference: [1.47]
[3] [E]
Reference: [1.53]
[4] [A]
Reference: [1.56]
[5] [A]
Reference: [1.69]
[6] [D]
Reference: [1.74]
[7] [E]
Reference: [1.79]
[8] [B]
Reference: [2.1]
[9] [A]
Reference: [2.2]
[10] [E]
Reference: [2.7]
[11] [A]
Reference: [2.10]
[12] [B]
Reference: [2.18]
[13] [D]
Reference: [2.26]
[14] [E]
Reference: [2.47]
[15] [D]
Reference: [3.11]
[16] [A]
Reference: [3.13]
[17] [C]
Reference: [3.32]
[18] [A]
Reference: [3.35]
[19] [C]
Reference: [3.47]
[20] [D]