# What pressure does a 1*g mass of gas exert when confined to a 1*L volume at a temperature of 298*K?

We could assume ideality...and thus $P = \frac{n R T}{V}$...but we need to the molar mass of the gas in order to assess the number of moles corresponding to the $1 \cdot g$ mass; i.e. ${n}_{\text{moles of gas"="mass"/"molar mass of gas}}$...