General Chemistry 10th Edition

Published by Cengage Learning
ISBN 10: 1-28505-137-8
ISBN 13: 978-1-28505-137-6

Chapter 3 - Calculations with Chemical Formulas and Equations - Questions and Problems - Page 120: 3.49

Answer

Mass percentage of C in the sample of coal is 86.27 %.

Work Step by Step

Mass percentage of C in the sample of coal = $\frac{m(C)}{m(sample)}$ $\times$ 100% Mass percentage of C in the sample of coal = $\frac{1.584 g (C)}{1.836 g(sample)}$ $\times$ 100% Mass percentage of C in the sample of coal = 0.8627 $\times$ 100% Mass percentage of C in the sample of coal is 86.27 %.
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