3.4 (B) Ideal Gas Law

What does 'n' represent in the Ideal Gas Law equation PV = nRT?

• Pressure

• Volume

• Number of moles of gas

• Temperature

In the Ideal Gas Law, what unit must temperature be expressed in?

• Celsius

• Fahrenheit

• Kelvin

• Rankine

What is the approximate value of the Universal Gas Constant (R) when pressure is in atmospheres, volume in liters, and temperature in Kelvin?

• 8.314 J/(mol·K)

• 0.0821 L·atm/(mol·K)

• 6.022 x 10^23 mol^-1

• 1.987 cal/(mol·K)

A rigid steel container with a volume of 20.0 L is filled with nitrogen gas to a final pressure of 200 atm at 27°C. How many moles of N2 gas does the cylinder contain?

• 162 moles

• 4000 moles

• 24.63 moles

• 0.0821 moles

How many moles are in 12.0 g of oxygen gas (O2)?

• 0.375 mol

• 0.750 mol

• 1.00 mol

• 12.0 mol

What is 25°C in Kelvin?

• 25 K

• 273 K

• 298 K

• 300 K

Which of the following equations can be used to calculate the density (g/V) of a gas?

• PV = nRT

• P(MM) = g/V * RT

• P(MM) / RT = g/V

• g/V = nRT / P