31 Questions
What is the formula to find the density of a gas?
d = m/V
What is the unit of R in the ideal gas law equation PV = nRT?
L kPa/mol K
What is the temperature in Kelvin at standard temperature and pressure (STP)?
273 K
A gas is pumped into a rigid container at 0°C and 1.0 atm. If the volume of the container is 8.0 L, what is the total pressure in the container?
2.5 atm
A sample of gas does not behave ideally. Which of the following is the best explanation?
The molecules are attracted to each other
Under which of the following conditions will H2 gas behave most like an ideal gas?
500 K and 0.10 atm
A mixture of CO(g) and H2(g) is pumped into a 2.0 L reaction vessel. If the total pressure is 1.2 atm, what will be the total pressure if the volume is reduced to 1.0 L at constant temperature?
2.4 atm
What is the formula to relate the temperature in Celsius to the temperature in Kelvin?
T(K) = T(°C) + 273
What can be concluded about the intermolecular forces of CHCl3 and water based on their vapor pressures at 40°C?
Water has weaker intermolecular forces than CHCl3.
If H2O, CHCl3, and CCl4 are sprayed on a blackboard, which one would evaporate the fastest?
CHCl3
What is the pressure of a gas in a barometer that reads 786 mm Hg?
0.97 atm
What happens to the pressure inside an open flask filled with air when it is heated?
The pressure increases.
How much of which gas can a 2-L container hold at STP?
7g of N2
What can be said about the vapor pressure of CHCl3 at 40°C compared to water?
CHCl3 has a higher vapor pressure than water.
What happens to the pressure of a gas when it is heated at constant volume?
The pressure increases.
Which of the following is a direct consequence of the vapor pressure of a substance?
Its boiling point.
What is the main reason why the pressure inside the flask cannot be determined without knowing the air pressure?
The air pressure outside the flask affects the pressure inside
According to the vapor pressure graph, which substance has the lowest vapor pressure at 40 °C?
H2O
Which substance would evaporate the fastest if sprayed on the blackboard?
CHCl3
What is true about the average kinetic energy of argon, oxygen, and helium at 300K?
All three gases will have the same average kinetic energy
What is an example of effusion?
A tire slowly leaking air through a pinhole puncture
What happens to the average kinetic energy of a gas as its temperature decreases?
It decreases
At 40°C, which substance has the highest vapor pressure?
CHCl3
What is the molar mass of a gaseous fluorinated methane compound if it has a density of 4.0 g/L at 1.90 atm and 28°C?
52.03 g/mol
What is the pressure inside a 1.0 L picture tube that contains 2.1×10–7 moles of N2 gas at 17°C?
5.0*10^-6 atm
Which of the following statements is true about the relationship between temperature and intermolecular forces?
As temperature increases, intermolecular forces decrease
What will be the volume of a gas at STP (1 atm, 0°C) if its volume is 35 L at 50 kPa and 90°C?
13.0 L
What will be the pressure of O2 if 1.4 atm of ozone O3 decomposes to oxygen gas, O2 at 300K?
2.1 atm
If we sprayed H2O, CHCl3, and CCl4 on the blackboard, which would you expect to evaporate the fastest?
CHCl3
If a 2.0 L bottle is filled with 0.25 moles of CO2 at a pressure of 3 atm, what will be the total pressure in the bottle if 10.0 g of argon is added?
4 atm
If a 2.0 L bottle is filled with 0.25 moles of CO2 at a pressure of 3 atm, what will be the partial pressure of CO2 if 10.0 g of argon is added?
3 atm
This quiz covers the basics of gases, including gas laws, formulas, and unit conversions. Test your knowledge of Graham's Law, PV=nRT, and more.
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