If oxygen gas and hydrogen gas are kept at the same temperature and pressure, th

Question

If oxygen gas and hydrogen gas are kept at the same temperature and pressure, the hydrogen molecules on the average move faster than the oxygen molecules. move more slowly than the oxygen molecules. move at the same speed as the oxygen molecules. have the greater kinetic energy. have a lower kinetic energy. The pressure exerted by a gas is inversely proportional to the volume it occupies. Which is the best theoretical explanation of this? When the space in which the gas molecules move is halved, the number of collisions they make with the walls per second is doubled. A gas always completely fills its container. If the pressure on a sample of gas is doubled, the gas is compressed to half its original volume. Gas molecules travel in straight lines at high speed. The sum of the partial pressures of the gases in a mixture is equal to the total pressure of the mixture. At standard conditions one molar mass of any gas will occupy 22.4 L. Therefore the molecular mass of any gas is the same. the molecules of all gases have the same velocity at standard conditions. all gases are diatomic. there will be the same number of molecules in one molar mass of any gas. the molecules of all gases are in rapid motion. The Kelvin temperature of one liter of gas is doubled and its pressure is tripled, volume will then be 1/6 L 2/3L 3/2L 6 L

Explanation / Answer

Q1

O2 > H2 in mass...

a) H2 moves faster than O2 is true

b) false, due to mass

c) false, due to mass

d) false, they have same K.E

e) false, due to K-e mass

Q2

best statement:

the number of collisions will be doubled due to the halved volume

Q3

there will be the same no. of molecules in one molar mass of any gas

Q4

P1V1/T1 = P2V2/T2

1*P1/T1 = (3P1)V2/(2T1)

1*= (3)V2/2

V2 = 2/3 Liters

choose B

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