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 10 Gases and Their Properties - Study Questions - Page 403b: 29

Answer

Work Step by Step

From the ideal gas law: $m/V=PM/RT$ $M=0.082057\ L.atm/mol.K×(25+273)\ K/(24.8\ mmHg×1\ atm/760\ mmHg)×0.0125\ g/0.125\ L $ $M=74.94\ g/mol$ Atomic weights: B: 10.81 g/mol, H: 1.008 g/mol Closest option: $B_6H_{10}$ $6×10.81+10×1.008=74.94\ g/mol$

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