College Physics (4th Edition)

Published by McGraw-Hill Education
ISBN 10: 0073512141
ISBN 13: 978-0-07351-214-3

Chapter 13 - Problems - Page 498: 30


The molar mass of ammonia is $17~g/mol$

Work Step by Step

A nitrogen atom consists of 7 protons and 7 neutrons. A hydrogen atom consists of 1 proton. A molecule of $NH_3$ consists of 10 protons and 7 neutrons. The mass of one molecule of $NH_3$ is $17~u$ Since $~1~u~$ has a molar mass of $1~g/mol$, the molar mass of ammonia is $17~g/mol$
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