#### Answer

$64.11347\frac{g}{mol}$

#### Work Step by Step

We know that
$PV=nRT$
$\implies n=\frac{PV}{RT}$
$n=\frac{0.862\times 1}{0.0820\times 298}=0.03525mol$
We can find the molar mass as
$molar mass=\frac{2.26g}{0.03525mol}=64.11347\frac{g}{mol}$

Published by
Cengage Learning

ISBN 10:
1-28505-137-8

ISBN 13:
978-1-28505-137-6

$64.11347\frac{g}{mol}$

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