What is the molar mass of a gas if a 17.6 g sample exerts a pressure of 2.0 atm in a 4.0 L container at 27 ° C?

Question

Quizplus · Accepted Answer

To find the molar mass, use the ideal gas law: PV = nRT. First, convert 27 °C to Kelvin (27 + 273 = 300 K). Then, solve for n (moles): n = PV/RT = (2.0 atm)(4.0 L) / (0.0821 L·atm/mol·K)(300 K) = 0.326 moles. Finally, calculate molar mass: 17.6 g / 0.326 moles = 54 g/mol.

What Is the Molar Mass of a Gas If a 17.6