Ideal Gas Law and Its Variations

What is the correct unit for pressure when using the ideal gas law constant 0.0821?

• Bar

• Pascals

• Atmospheres

• Torr

In the equation PM = DRT, what does the 'D' represent?

• Diameter

• Density

• Distance

• Diffusion

What is the standard temperature in Kelvin used in gas law problems?

• 0 K

• 100 K

• 273 K

• 373 K

If a gas has a density of 1.70 g/L at STP, what is the first step to find its molar mass using PM = DRT?

• Divide pressure by density

• Multiply density by the gas constant and temperature

• Multiply density by temperature

• Subtract temperature from pressure

After calculating the molar mass of a diatomic gas, what should you do to find the identity of the gas?

• Divide the molar mass by two

• Multiply the molar mass by two

• Add the molar mass to the atomic number

• Subtract the molar mass from the atomic number