Page 341 - Theory and Problems of BEGINNING CHEMISTRY
P. 341
ANSWERS TO QUIZZES
Chapter 1
1. (a) Sodium (b) Sulfur (c) Tin (d ) Calcium
2. (a)K (b)Al (c)Cl (d ) Pb (Note that the first letter must be capitalized and the second, if any, lower case. If not,
you are wrong.)
3. Silver
Chapter 2
1. (a) 0.00259 kg/mL (Three significant digits. Do not forget the units!)
(b) 112.5 cm
(c) 4.5 cm
1mL
2. 125 g = 9.19 mL
13.6g
3. 5.25 × 10 −3 kg + 1.17 × 10 −1 kg = 1.22 × 10 −1 kg
Chapter 3
1. (a)20.0g + 30.9g = 50.9g (c) 50.9 g (9.1 g of chlorine does not react.)
(b) The law of conservation of mass (d) The law of definite proportions
2. (a) 143 (b)2
50.54 49.46
3. 78.92 amu + 80.92 amu = 79.91 amu
100 100
Chapter 4
2
2
6
2
6
6
2
2
2
1. (a)1s 2s 2p 3s 1 (b)1s 2s 2p 3s 3p 4s 3d 6
2
6
2
10
10
6
2
2
6
2
2
2
6
(c)1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 5d 4f 14
2. See Figure 4-4. (However, you do not have to be an artist. For example, draw only the x and z axes and the outline of
the four lobes of the 3d xz orbital.)
Chapter 5
1. (a)Al 2 O 3 (b) MgS (c) PbO 2 (d) (NH 4 ) 2 S
2. (a) Cl P Cl (b) H O H (c) +
..
Cl [ H N H
..
.. ..
H
H [
Chapter 6
1. (a) Manganese(II) ion (b) Magnesium ion (c) Ammonium ion (d) Lead(IV) ion
2. (a)Na 2 SO 3 (b) Al(NO 3 ) 3 (c) NiSO 4 (d)Cu 2 S
3. (a) Cobalt(III) chloride (b) Potassium dichromate (c) Tin(II) phosphate (d ) Silver nitrate
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