What is the molar mass of 65.18 g of gas exerting a pressure of 2.25 atm on the walls of a 4.81 L container at 350 k?

S. t. f. u f. f. s and 551ft of gas

Molar mass = grams / moles

the grams are already given 65.18 grams. we have to find the moles to get the molar mass using the ideal gas law formula

ideal gas law---> PV = nRT

P=2.25 atm

V = 4.81 Liters

R = 0.0821 atm·L / mol·K

T = 350 K

n = moles?

we can rearrange the formula to solve for moles.

n = PV/RT

n = (2.25 x 4.81) / (0.0821 x 350 K) = 0.377 moles

molar mass = 65.18 grams / 0.377 moles = 173 g/mol