# What is the pressure in a 19.2 L cylinder filled with 0.690 mol of nitrogen gas at a temperature of 323 K?

Jan 19, 2017

#### Answer:

$P = \frac{n R T}{V} \cong 1 \cdot a t m$

#### Explanation:

From the Ideal Gas Law,

$P = \frac{n R T}{V} = \frac{0.690 \cdot m o l \cdot \times 0.0821 \cdot L \cdot a t m \cdot {K}^{-} 1 \cdot m o {l}^{-} 1 \times 323 \cdot K}{19.2 \cdot L}$

$\cong 1 \cdot a t m$

What is the pressure if we were to change the nitrogen gas to helium gas?