What is the molar mass of a gas if 0.281 g of the gas occupies a volume of 125 ml at a temperature 126 °c and a pressure of 777 torr?

The molar mass of gas is 72.03 g/mol.

Explanation:

Volume of the gas = V = 125 mL= 0.125 L

Pressure of the gas = P = 777 torr = 1.021 atm

(1 torr = 0.0013 atm)

Temperature of the gas = T= 126 °C = 399 K

Mass of the gas = 0.281 g

Number of moles of gas = n =

Using Ideal gas equation:

M = 72.03 g/mol

The molar mass of gas is 72.03 g/mol.

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