First slide

Combined gas law and ideal gas equation

Question

Density of oxygen gas at 2 atmosphere and 546 K will be

Easy

A

$2.858 g / lit$
B

$1.428 g / lit$
C

$0.714 g / lit$
D

$2.151 g / lit$

Solution

$d = \frac{PM}{RT} = \frac{(2 atm) (32 g {mole}^{- 1})}{(0.0821 lit - atm {mol}^{- 1} K^{- 1}) (546 K)} = \frac{32 g}{22.4 lit} = 1.428 g / lit$

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