00:01
So here in this question, we are given that what is the molar mass of an unknown gas with a density of 3 .55 gram per liter at one atmosphere and 25 degrees celsius.
00:12
So the density is given to us, which is 3 .55 gram per liter.
00:18
And we're given the pressure, which is one atmosphere.
00:23
And we're given the temperature, which is 25 degrees celsius.
00:26
Or we can write it is equal to 298 kelvin.
00:30
Okay, gas constant r is equal to 0 .08 to 1, liter atmosphere, mole, kelvin, per mole kelvin, okay? so we can calculate the molar mass using this equation.
00:50
So we can use pm is equal to drt...