General, Organic, and Biological Chemistry: Structures of Life (5th Edition)

Published by Pearson
ISBN 10: 0321967461
ISBN 13: 978-0-32196-746-6

Chapter 7 - Chemical Reactions and Quantities - 7.5 Molar Mass and Calculations - Questions and Problems - Page 259: 7.39

Answer

a. 70.90 g/mol b. 90.08 g/mol c. 262.9 g/mol d. 83.98 g/mol

Work Step by Step

1. Consult a periodic table in order to get the atomic mass of each element, and then multiply it by its subscript. 2. Sum the masses of each element in the compound. a. ( 35.45 $\times$ 2 )= 70.90 g/mol b. ( 1.008 $\times$ 6 )+ ( 12.01 $\times$ 3 )+ ( 16.00 $\times$ 3 )= 90.08 g/mol c. ( 24.31 $\times$ 3 )+ ( 16.00 $\times$ 8 )+ ( 30.974 $\times$ 2 )= 262.9 g/mol d. ( 26.98 $\times$ 1 )+ ( 19.00 $\times$ 3 )= 83.98 g/mol
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