Calculate the density of a certain gas if its pressure is 0.725 atm, its molar mass is 48.22 g/mol, and the temperature of the has is 24.0 degrees Celsius
Two ways you can do this.
1) Use PV = nRT. You have P and T, use V as 1L and solve for n. Then n x molar mass = grams and that is grams in 1L which is the density.
2)Work on the PV = nRT equation and do all of this in one step as follows:
PV = nRT but since n = grams/molar mass, that is PV = gRT/M. Rearrange to obtain
PVM = gRT and rearrange to obtain
PM = (g/v)RT. g/V = density so
PM = dRT.