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: 3.51

Answer

Mass percentage of phosphorus in the sample of phosphorus oxychloride is 20.2 %

Work Step by Step

Mass percentage of phosphorus in the sample of phosphorus oxychloride= $\frac{m(phosphorus )}{m(sample)}$ $\times$ 100% Mass percentage of phosphorus in the sample of phosphorus oxychloride = $\frac{1.72mg (phosphorus )}{8.53 mg(sample)}$ $\times$ 100% Mass percentage of phosphorus in the sample of phosphorus oxychloride = 0.2016 $\times$ 100% Mass percentage of phosphorus in the sample of phosphorus oxychloride is 20.16 % or 20.2 % ( to three significant figures).
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