Question

A student determines that a gas has a density of 1.948gL at a pressure of 748.1 mmHg and a temperature of 22.9 C. What is molar mass of gas?

Answer 1

Answer: 48.0 g/mol

Step-by-step explanation:

The formula for molar mass of a gas is M=(RTd)/P, where R is the gas constant, d is density, T is temperature in kelvin, and P is pressure in atm.

First, we must convert mmHg to atm, 748.1/760= 0.9843 atm.

Then, we must convert C to K, 22.9+293=295.9K.

Lastly, we can plug in our values:

M=(1.948x0.082x295.9)/0.9843=48.0g/mol