Practice Problem: Molar Mass of a Gas

The video tutorial explains how to calculate the molar mass of a gas using the ideal gas law. It starts with a sample problem involving a hydrocarbon gas, providing given values such as mass, volume, temperature, and pressure. The tutorial then demonstrates how to use the ideal gas law (PV = nRT) to find the number of moles and subsequently calculate the molar mass. Finally, it identifies the gas as methane based on its molar mass and chemical composition.

What is the initial problem presented in the video regarding the gas sample?

• Identifying the gas using its molar mass

• Calculating the volume of the gas

• Finding the pressure of the gas

• Determining the temperature of the gas

Which formula is used to calculate the number of moles in the gas sample?

• E = mc^2

• V = IR

• F = ma

• PV = nRT

What is the value of the gas constant R used in the calculations?

• 0.0821 liters atmospheres per mole Kelvin

• 1.00 liters atmospheres per mole Kelvin

• 8.314 J per mole Kelvin

• 0.0821 J per mole Kelvin

How is the temperature converted for use in the ideal gas law calculations?

• From Fahrenheit to Kelvin

• From Celsius to Kelvin

• From Kelvin to Celsius

• From Celsius to Fahrenheit

Which hydrocarbon is identified as the gas based on its molar mass?

• Ethane

• Propane

• Methane

• Butane