Chapter 11

What is standard atmospheric pressure (in \(\mathrm{cm}\) ) measured by a barometer filled with water (given that mercury is 13.6 times more dense than water)?

A deep-sea scuba tank contains oxygen and helium gases. If the partial pressures of the gases are 35 atm and 125 atm, what is the total pressure (in psi)?

A bicycle tire contains nitrogen, oxygen, and argon gases. If the partial pressures are \(51.0 \mathrm{psi}, 13.5 \mathrm{psi},\) and \(0.5 \mathrm{psi},\) what is the total pressure (in atm)?

The decomposition of baking soda produces carbon dioxide gas. If \(42.5 \mathrm{~mL}\) of wet gas is collected over water at \(22{ }^{\circ} \mathrm{C}\) and \(764 \mathrm{~mm} \mathrm{Hg}\), what is the volume of dry gas at STP conditions? (The vapor pressure of water at \(22^{\circ} \mathrm{C}\) is \(19.8 \mathrm{~mm}\) Hg. .

Calcium metal and water produce hydrogen gas. If the volume of wet gas collected over water is \(95.0 \mathrm{~mL}\) at \(20^{\circ} \mathrm{C}\) and \(758 \mathrm{~mm} \mathrm{Hg},\) what is the volume of dry gas at STP conditions? (The vapor pressure of water at \(20^{\circ} \mathrm{C}\) is \(17.5 \mathrm{~mm}\) Hg.)

What pressure (in atm) is exerted by \(1.51 \times 10^{23}\) oxygen molecules at \(25^{\circ} \mathrm{C}\) in a 5.00 -L container?

What volume (in liters) is occupied by \(3.38 \times 10^{22}\) nitrogen molecules at \(100^{\circ} \mathrm{C}\) and \(255 \mathrm{~mm} \mathrm{Hg} ?\)

Natural gas contains methane, \(\mathrm{CH}_{4}\), ethane, \(\mathrm{C}_{2} \mathrm{H}_{6},\) and hydrogen sulfide, \(\mathrm{H}_{2} \mathrm{~S}\). Which molecules have the fastest velocity?

Bottled gas for recreational vehicles contains propane, \(\mathrm{C}_{3} \mathrm{H}_{8},\) and butane, \(\mathrm{C}_{4} \mathrm{H}_{10} .\) Which molecules have the faster velocity?

A sample of chlorine gas occupies \(1550 \mathrm{~mL}\) at \(0.945 \mathrm{~atm}\) and \(50^{\circ} \mathrm{C}\). What is the mass of the sample?