We are asked to find the molar mass of the gas.

A sample of gas has a mass of 0.555 g . Its volume is 118 mL at a temperature of 86 ^{o}C and a pressure of 742 mm Hg.

Given:

m = 0.555 g

T= 86°C +27.15 = 359.15 K

P = 742 mmHg = 0.976 atm

V = 118 mL = 0.118 L

A sample of gas has a mass of 0.555 g . Its volume is 118 mL at a temperature of 86 ^{o}C and a pressure of 742 mm Hg.

Find the molar mass of the gas.

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