Chemistry and Chemical Reactivity (9th Edition)

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

Chapter 4 Stoichiometry: Quantitative Information about Chemical Reactions - Study Questions - Page 179c: 29



Work Step by Step

Number of moles of the red solid: $0.206\ g\div288.915\ g/mol=0.000713\ mol$ From stoichiometry, that's the same number of moles of nickel (II) nitrate and NiS $0.000713\ mol\times 90.758\ g/mol=0.0647\ g$ Mass fraction: $0.0647\ g/0.468\ g\times100\%=13.83\%$
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