Practice problems
Gas knowledge
Random
Real life applications
Gas stoichiometry
100
How many liters are 0.71 moles of Cl2 at STP?
16 L
100
Average kinetic energy of particles
What is temperature
100
The Combined Gas Law includes which 3 Gas Laws?
Boyle's, Charles', and Gay-Lussac's
100
A football inflated inside and then taken outdoors on a winter day shrinks slightly.
What is Charles law
100
What is the mass of 7.2x109 molecules of oxygen gas?
3.83 x 10-13 g
200
If I have 3.7 moles of gas at 5.0 L and 210 K, what would the pressure in atm be?
13 atm
200
Number of collisions of hydrogen molecules with their container
What is pressure
200
Gas composition of troposphere
78% nitrogen
21% oxygen
1% other gases
200
In what way does Charles's Law relate to the inflation of a balloon on a hot day?
What is the increase in volume of the balloon as the temperature rises, demonstrating the direct relationship between volume and temperature?
200
Fe3O4 + 4CO -->3Fe + 4CO2
How many moles of CO are needed to react with 16.5 g of Fe3O4 ?
What is 0.285 moles CO
300
30 mL of hydrogen gas at 200 K are heated to 400 K, what would be the new volume. (Pressure is constant)
60mL
300
273 Kelvin, 760 mmHg
What is STP (standard temperature and pressure)
300
What is the value for R, and what are its units?
0.0821 L*atm/mol*K
300
How does Charles's Law play a role in the functioning of hot air balloons?
What is the expansion of the air inside the balloon as it is heated, decreasing its density and causing it to rise in the cooler surrounding air?
300
Calculate the mass of iron that must be used to obtain 0.500 L of hydrogen at STP.
3Fe(s) + 4H2O(l) → Fe3O4(s) + 4H2(g)
0.935 g Fe
400
44.0 mL of a gas is at 10.0 Celsius and 152 mmHg, is heated to 41.0 Celsius while increasing the pressure to 2432 mmHg. What would be the new volume?
3.05 mL
400
22.4 L at STP
What is one mole of any gas
400
Write the formula to calculate the initial pressure (P1) for combined gas law.
P1= (P2 x V2 x T1) / (V1 x T2)
400
Firing a bullet. When gunpowder burns, it creates a large amount of superheated gas. The high pressure of the hot gas behind the bullet forces it out of the barrel of the gun.
What is Gay-Lussac's
400
Calculate the volume of chlorine gas at STP that is required to completely react with 3.50 g of silver, using the following equation:
2Ag(s) + Cl2(g) → 2AgCl(s)
0.363 L Cl2
500
If I start with 0.90 atm at 10.0 Celsius and cool it to 3.0 Celsius, what would be the new pressure. (Volume is constant)
0.88 atm
500
The atmospheric pressure equals the vapor pressure of a liquid
What is the the boiling point
500
Full name of the scientist who described the relationship between volume and the number or moles.
Amedeo Avogadro
Italian physicist
500
The bubbles exhaled by a scuba diver deep down grow larger as they approach the surface of the ocean.
What is Boyle's law
500
C2H2(g) + O2(g) → H2O(g) + CO2(g)
If you have a 10.0-L tank of acetylene at 25.0°C and 1.00 atm pressure, how many moles of CO2 will be produced if you burn all the acetylene in the tank?
2C2H2(g) + 5O2(g) → 2H2O(g) + 4CO2(g)
0.817 mol CO2
600
2.9 L of helium gas are at 5 atm and a temperature of 50°C. What will be the temperature of the gas if volume decreased to 2.4L and pressure changed to 3 atm?
T2= (3 atm x 2.4 L x 323 K) / (5atm x 2.9L )
T2= 160.38 K
T2 = -112.62 C
600
Jacques Charles (born November 12, 1746, Beaugency, France—died April 7, 1823, Paris) was a French mathematician, physicist, and inventor who, with Nicolas Robert, was the first to ascend in a hydrogen balloon (1783). About 1787 he developed Charles's law concerning the thermal expansion of gases.
600
1 moles of oxygen gas occupies 22.4 L. What must the temperature and pressure be?
0 C (273 K) and 1 atm
600
Empty 0.5 L plastic water washed up shriveled on the shore of Newfoundland.
Combined gas law
600
When heated, solid potassium chlorate (KClO3 ) decomposes to form solid potassium chloride and oxygen gas. If 20.8 g of potassium chlorate decomposes, how many liters of oxygen gas will form at STP?
5.07 L O2