# A 16.0 L gas cylinder is filled with 7.60 moles of gas. The tank is stored at 41 degrees Celcius. What is the pressure in the tank?

$P \cong 12 \cdot a t m$
Using the Ideal Gas Equation, $P = \frac{n R T}{V}$ $=$ $\frac{7.6 \cdot m o l \times 0.0821 \cdot L \cdot a t m \cdot {K}^{-} 1 \cdot m o {l}^{-} 1 \times 314 \cdot K}{16.0 \cdot L}$ $=$ ??atm
With these problems, we are always faced with choosing the appropriated gas constant, $R$. Typically, chemists use $\text{litres}$ and $\text{atmospheres}$. Absolute temperature in $\text{degrees Kelvin}$ is common to these problems.