Practice Problem: Density of a Gas

The video tutorial explains how to identify an unknown gas using its density, temperature, and pressure. It involves using the ideal gas law (PV=nRT) to calculate the molar mass of the gas. By assuming a volume of one liter, the tutorial demonstrates how to convert pressure units, calculate moles, and determine the molar mass. The calculated molar mass of 4.0 grams per mole leads to the identification of the gas as helium, based on its atomic mass.

What is the molar mass of the gas calculated in the text?

Which gas is identified at the end of the calculations?