Gas Chapter Review Sheet -2015
Name the gas law or phrase that best fits the definition:
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The pressure of a gas varies directly with temperature if the volume is held constant.
The volume of gas varies inversely with the pressure if the temperature is constant.
The total pressure of a mixture of gases is equal to the sum of the partial pressures of the gases.
The relationship between pressure, volume and temperature of a gas when the mass is constant.
The volume of a gas varies directly with the temperature if the pressure is constant.
Equal volumes of gases at the same temperature and pressure contain equal numbers of molecules
At STP is 22.4 liter(regardless of the gas) equals one mole
Bond that shares electrons equally
Bond that shares electrons unequally
Weakest IMF that occurs between molecules
IMF that may involve only H,F,O or N
8 valence electrons
Which diffuses faster?
Low molar mass or high molar mass?
Polar or nonpolar molecules?
Low IMF or high IMF?
Which gas would be expected to diffuse faster of each pair? (Think: molar mass and bonding)
a. CO2 or N2
b. H2O or N2
Why is Ne considered close to an Ideal Gas and Water vapor considered to be REAL gas?
What does STP mean and what are the values for STP?
What temperature and pressure conditions help to make a gas behave IDEALLY?
If the water vapor chart is not used when a gas is collected over water, would the pressure be falsely high or
low?
If the temperature remains constant and the pressure increases, the volume should ______________.
If the pressure is help constant and the temperature is increased, the volume should ___________.
Fluidity, expansion and diffuse occur due to __________ IMF.
The state of matter of a substance depends on the __________________of the Intermolecular Forces.
What is the unit for the gas constant?
What is the unit for molar mass?
What is the equivalent in Celcius to 312 Kelvin?
A sample of gas was collected at a temperature of 35 C and 1.35 atm of pressure and had a volume of 65.0 mL.
What temperature would be required to have the same gas at 1.10 atm with a volume of 55.0 mL?
If 75.0 mL of a gas was COLLECTED over water at a temperature of 23 C and a pressure of 795 mmHg, what is
the new volume of the dry gas at STP?
If 95.0 mL of a gas is collected at 655 mmHg, what is the pressure needed to produce a volume of 105 mL?
What is the molar mass of a gas at STP if the volume is 585 mL and the gas has a mass of 7.75 grams?
What is the mass in grams of a 3.25 mL sample of Nitrogen dioxide gas at STP?
What is the pressure of a gas that contains .569 moles of the gas at a temperature of 25 C and a volume of 5.68L
What is the molar mass of a gas if 9.62 grams of the gas occupies 4.32 Liters at 23 C and 745 mmHg?
What is the mass in grams of a sample of nitrogen that is collected at 775 mmHg at 25 C and has a volume of
1250. mL?
34. What is the volume of the gas that is collected over water at 795 mmHg at 25 C and was found to contain .0236
moles of Oxygen?
For the next 4 problems- use this reaction: Potassium chlorate  Potassium chloride + oxygen
35. A sample of Potassium chlorate was heated and decomposed to produce potassium chloride and oxygen. If
650. mL of oxygen gas was collected at 754 Torr and 21 Celcius, what is the mass of Potassium chlorate needed
to complete the reaction?
36. If 456 grams of Potassium chlorate was used at 30 C and 4.45 atm, how many mL of the Oxygen gas could be
collected?
37. A chemist needed to produce 32.0 Liters of oxygen gas from the above reaction at STP, how many grams of
Potassium chlorate would be needed to complete the reaction?
38. The reaction was performed at STP and only 6.98 grams of Potassium chlorate was decomposed. How many mL
of oxygen gas was recovered?
Be sure to review the homework sheets because I may have only placed one example of a type of problem on this
worksheet.
You MUST KNOW and WRITE all formulas- I will only provide a Periodic Table,
Water vapor-pressure chart and paper. I WILL NOT provide formulas.
Don’t get a false sense of security because you could work the problems in classeveryone needs to review all problem types and the notes to do well on this test