1. Derive an expression for the gas density (m/V) by using
the Ideal Gas Law and the relationship between moles of a gas and its mass
(m).
2. A gaseous sample of a compound has a gas density of
0.977 g/L at 710.0 torr and 100.0°C. What is the molar mass of this
compound? If this compound contains only nitrogen and hydrogen and is 87.4%
nitrogen by mass, what is the molecular formula of the compound?
3. The valve between a 10 L tank containing a gas at 7
atm and a 15 L tank containing a gas at 10 atm is opened. What is the final
pressure in the tanks?
4. Which of the following statements is/are correct according
to the Ideal Gas Law for a gas cylinder of fixed volume filled with one
mole of oxygen.
When the temperature of the cylinder changes from 15°C
to 30°C, the pressure inside the cylinder doubles.
When a second mole of oxygen is added to the cylinder,
the ratio T/P remains constant.
An identical cylinder filled with the same pressure of
hydrogen contains more molecules because hydrogen is smaller than oxygen.
When a second mole of oxygen is added to the cylinder,
the ratio T/P decreases by 50%.