17) A 8.10 L container holds a mixture of two
gases at 21 °C. The partial pressures of gas A and gas B,
respectively, are 0.369 atm and 0.755 atm. If 0.120 mol of a third
gas is added with no change in volume or temperature, what will the
total pressure become?
18) A gas mixture is made by combining 8.0 g
each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture
occupies a volume of 18.97...