WorksheetsGases and Gas Properties
Total questions: 25
Worksheet time: 33mins
A pressure of 745 mmHg corresponds to ___ kPa.
99.3
55.89
745
0.980
Liquid nitrogen has a boiling point of -196 °C this corresponds to…
77 K
-469 K
153 K
469 K
1.20 atm is the same pressure as:
912 mmHg
1.2 mmHg
760 mmHg
850 mmHg
358 mmHg
For an ideal gas, which pair of variables are inversely proportional to each other (if all other factors remain constant)?
P, V
P, T
V, T
n, P
A real gas would act most ideal at (Hint: Low pressure and high temperature)
1.0 atm and 273 K
10 atm and 546 K
10 atm and 273 K
0.5 atm and 546 K
0.5 atm and 273 K
One mole of hydrogen, H2 , occupies 61.2 L at
100 ℃ and .500 atm
50 ℃ and 0.500 atm
0 ℃ and 0.500 atm
200 ℃ and 1.00 atm
100 ℃ and 1.00 atm
A 31.0 mL sample of gas is collected at a temperature of 37 °C and pressure of 720 mmHg. What is its volume at 17 °C and 580 mmHg?
36.0 mL
23.0 mL
27 mL
41 mL
58 mL
The coldest possible temperature of a gas is:
-273 °C
-273 K
273 K
0 °C
The pressure of 4.0 L of an ideal gas in a flexible container is decreased to one-third of its original pressure and its absolute temperature is decreased by one-half. The volume then is
6.0 L
1.0 L
4.0 L
8.0 L
24 L
A given mass of gas in a rigid container is heated from 100 ℃ to 300 ℃. Which of the following best describes what will happen to the pressure of the gas? The pressure will…
increase by a factor less than three.
decrease by a factor of three.
increase by a factor of three.
decrease by a factor greater than three.
What is the pressure exerted by some nitrogen gas collected in a tube filled with water on a day when the room temperature is 18.0 °C and the room pressure is 750.0 mmHg? [The partial pressure of water at 18 °C is 15.5 mmHg.]
734.5 mmHg
15.5 mmHg
750.0 mmHg
760.0 mmHg
732.0 mmHg
As the average kinetic energy of the molecules of a sample increases, the temperature of the sample
increases
decreases
remains the same
more information is needed
If a gas that is confined in a rigid container is heated, the pressure of the gas will…
increase
decrease
remain the same
more information is needed
A mixture of gases at 810 kPa pressure contains 3.0 moles of oxygen gas, 2.0 moles of helium gas, and 4.0 moles of carbon dioxide gas. What is the partial pressure of helium gas? (Hint: Multiply the total pressure by the correct mole fraction)
180 kPa
405 kPa
1620 kPa
81.0 kPa
810 kPa
If a gas has a pressure of 2.0 atm, which one of the following equations will express its pressure after...
• the number of moles has been increased to three times the original amount
• the absolute temperature (K) has been reduced to half
• the volume has been tripled?
P2 = 2.0 atm x (3/1) x (1/2) x (1/3)
P2 = 2.0 atm x (1/3) x (2/1) x (4/1)
P2 = 2.0 atm x (3/1) x (2/1) x (1/3)
P2 = 2.0 atm x (1/3) x (4/1) x (3/1)
A sample of gas occupies 30.0 L at 0.800 atm and 298 K. How many moles of gas are in the sample?
0.981 mol
22.4 mol
1.02 mol
2.23 mol
none of these
When ammonium nitrite undergoes decomposition, only gases are produced according to the equation:
NH₄NO₂ (s) → N₂ (g) + 2H₂O(g)
What is the total volume of gases produced at 819K and 1.00 atm pressure when 128 g of ammonium nitrite undergoes the above decomposition reaction?
403 L
22.4 L
64 L
128 L
At STP, it was found that 1.12 L of a gas had a mass of 2.78 g. Its molar mass is
55.6 g/mol
2.78 g/mol
27.8 g/mol
111 g/mol
A mixture of gases, nitrogen, oxygen, and carbon dioxide at 27 ℃ and 0.50 atmospheres pressure occupied a volume of 492 mL. How many moles of gas are there in this sample?
0.010 mol
1/9 mol
7.6 mol
10 mol
At a given temperature, gaseous ammonia molecules (NH3) have a velocity that is ____ gaseous sulfur dioxide molecules (SO2).
greater than
less than
equal to
more information needed
Assuming STP, determine the volume of hydrogen gas needed to react completely with 5.00 L of oxygen gas to form water. (Hint: Write the balanced chemical equation)
10.0 L H₂
1.00 L H₂
2.50 L H₂
0.446 L H₂
What volume of oxygen gas is needed for the complete combustion of 4.00 L of propane gas (C₃H₈)? Assume temperature and pressure are constant at conditions of STP.
20.0 L O₂
0.800 L O₂
17.9 L O₂
0.179 L O₂
Ammonia is synthesized from hydrogen and nitrogen.
N₂(g) + 3H₂(g) → 2NH₃(g)
If 5.00 L of nitrogen reacts completely with hydrogen at a pressure of 3.00 atm and a temperature of 298 K, how much ammonia, in grams, is produced?
21.0 g NH₃
17.0 g NH₃
1.23 g NH₃
10.0 g NH₃
When iron rust, it undergoes a reaction with oxygen to form iron(III) oxide.
4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)
Calculate the volume of oxygen gas at STP that is required to completely react with 52.0 g of iron.
15.6 L O₂
56.0 L O₂
22.4 L O₂
3.50 L O₂
Is the volume of gas directly or inversely proportional to the number of moles of gas at constant temperature and pressure?
directly proportional
inversely proportional
the volume a gas is negligible
more information is needed
