Question

Consider separate 1.0 L samples of the following gases at STP: Cl₂, C₂H₆, and Xe.
Which of the following statements are true regarding these gas samples?


TrueFalse The C₂H₆ gas sample has the most molecules of gas present.

TrueFalse The C₂H₆ gas sample has the smallest average kinetic energy.

TrueFalse The mass of the gas in each container is different.

TrueFalse The C₂H₆ gas sample has the lowest density.

TrueFalse Each Xe gas particle collision with the container wall is more forceful as compared to each C₂H₆ and Cl₂ collision.

TrueFalse The C₂H₆ gas molecules collide with the container walls most frequently.
i put false, false, true, true, false, false but its wrong

Answer 1

False : The C₂H₆ gas sample has the most molecules of gas present.
according to avagadro's law equal number of moles of a gas occupies eqaual volumes.

False : The C₂H₆ gas sample has the smallest average kinetic energy.

Because average kinetic energy depends upon absolute temperature but not nature of sample

True : The mass of the gas in each container is different.

Eventhough number of moles are same but molar mass is different so mass of each component different.

True : The C₂H₆ gas sample has the lowest density.

number of moles of a gas n = 1 * 1 / (0.0821*273) = 0.0446

mass of Cl2 = 0.0446 * 71 = 3.1678

mass of Xe = 0.0446 * 131.29 = 5.8555

mass of C2H6 = 0.0446 * 30 = 1.338

density is directly proportional to mass of substance.

False: Each Xe gas particle collision with the container wall is more forceful as compared to each C₂H₆ and Cl₂ collision.

Because molar mass high means its velocity less accrding to root mean velocity definition.