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 95k: 161

Answer

C

Work Step by Step

Number of moles of calcium chloride: $0.739\ g\div 110.97\ g/mol=0.00666\ mol$ Number of moles of water: $(0.832-0.739)\ g\div 18.015\ g/mol=0.00516\ mol$ Ratio: $0.00666/0.00516=1.29$ Since this value is smaller than the actual value, there's still water in the sample.
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