Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning
ISBN 10: 1133949649
ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95d: 71


a) $290.8\ g/mol$ b) $249.7\ g/mol$

Work Step by Step

Atomic weights: $Ni: 58.693u,\ O: 15.999u,\ S: 32.06u,\ N: 14.007u,\ C: 12.011u,\ Cu: 63.546u,\ H:1.008u$ $H_2O$: 2 H + 1 O: $2\times1.008+15.999=18.01\ g/mol$ a) $Ni(NO_3)_2\dot{}6\ H_2O$: 1 Ni + 2 N + 6 O + 6 $H_2O$: $58.693+2\times14.007+6\times15.999+6\times18.01=290.8\ g/mol$ b) $CuSO_4\dot{}5\ H_2O$: 1 Cu + 1 S + 4 O + 6 $H_2O$: $63.546+32.06+4\times15.999+5\times18.01=249.7\ g/mol$
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