Question

What is the molar mass of 81.50 g of gas

exerting a pressure of 1.75 atm on the
walls of a 4.92 L container at 307 K?

Answer 1

239

Step-by-step explanation:

Answer 2

The molar mass of gas = 238.29 g/mol

Further explanation

Given

mass = 81.5 g

P=1.75 atm

V=4.92 L

T=307 K

Required

molar mass

Solution

The gas equation can be written

`\large{\boxed{\bold{PV=nRT}}`

`\tt n=(mass)/(molar~mass)`

So the equation becomes :

`\tt Molar~mass=(mRT)/(PV)`

Input the value :

`\tt M=(81.5* 0.082* 307)/(1.75* 4.92)\\\\M=238.29~g/mol`