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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