Question 1(multiple choice worth 3 points)
(06.06 mc)
a gas has a mass of 3.82 g and occupies a volume of 0.854 l. the temperature in the laboratory is 302 k, and the air pressure is 1.04 atm. calculate the molar mass of the gas.
35.8 g/mol
72.3 g/mol
93.4 g/mol
107 g/mol
question 2(multiple choice worth 3 points)
(06.06 lc)
which of the following will have the slowest rate of diffusion at a given temperature?
cl2
h2
he
ne
question 3(multiple choice worth 3 points)
(06.06 mc)
under what conditions will a gas be least likely to exhibit the ideal gas properties predicted by the ideal gas law?
high pressures and high temperature, because particles are forced closer together with higher kinetic energy, so intermolecular forces of attraction increase
high pressure and low temperature, because particles are forced closer together and moving slower, so intermolecular forces of attraction increase
low pressure and high temperature, because particles are spread farther apart and faster moving, so the volume of the particles is more significant
low pressure and low temperature, because particles are spread farther apart with lower kinetic energy, so the volume of the particles is more significant
question 4(multiple choice worth 3 points)
(06.06 lc)
which of the following leads to a higher rate of effusion?
cooler gas sample
lower molar mass
slower particle movement
reduced temperature
question 5(multiple choice worth 3 points)
(06.06 mc)
what is the density of aluminum chloride vapor (alcl3) at 498 k and 0.939 atm?
1.24 g/l
3.06 g/l
5.17 g/l
7.42 g/l
question 6 (essay worth 5 points)
(06.06 mc)
explain how the rate of diffusion of a gas is related to its molar mass.
carbon dioxide gas (co2) effuses 3.2 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.