# An engineer pumps 200.50 grams of carbon monoxide (CO) gas into a cylinder capacity of 120.0 L. What is pressure inside the cylinder at 45.0°C?

$P = \frac{n R T}{V}$, approx. $1.6$ $a t m$
${n}_{C O}$ $=$ $\frac{200.50 \cdot g}{28.01 \cdot g \cdot m o {l}^{-} 1}$ $=$ $7.158 \cdot m o l$
$\text{Pressure} = \frac{7.158 \cdot m o l \times 0.0821 \cdot L \cdot a t m \cdot {K}^{-} 1 \cdot m o {l}^{-} 1 \times 318 \cdot K}{120.0 \cdot L}$