Chemistry and Chemical Reactivity (9th Edition)

by Kotz, John C.; Treichel, Paul M.; Townsend, John R.; Treichel, David A.

Published by Cengage Learning

ISBN 10: 1133949649

ISBN 13: 978-1-13394-964-0

Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95i: 139

Answer

$7.36\ kg$ of iron

Work Step by Step

Atomic weights (g/mol): $Fe: 55.845, \ S: 32.06$ Molar mass of $FeS_2$: $119.965\ g/mol$ Mass fraction of Fe: $55.845\div119.965\times100\%=46.55\%$ In 15.8 kg of iron pyrite: $15.8\times46.55/100=7.36\ kg$

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