Which of the following statements is correct A Heat is transferred through

# Which of the following statements is correct a heat

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84.Which of the following statements is correct? A)Heat is transferred through molecular collisions.B)When a gas is heated at constant volume, the molecules collide with one another more often.C)Both a and b are correct.D)Neither a nor b are correct. 85.Uranium hexafluoride (UF6) is a much heavier gas than helium, yet at a given temperature, the average kinetic energies of the molecules of the two gases are the same.Explain. 86.Compare the root-mean-square speeds of O2and UF6at 65 C. 87.The temperature in the stratosphere is -23C. Calculate the root-mean-square speeds of N2, O2, and O3molecules in this region. 88.The average distance traveled by a molecule between successive collisions is called mean free path.For a given amount of a gas, how does the mean free path of a gas depend on density? A) Inversely proportional to density. B) Directly proportional to density.
C)Independent of density. 89.For a given amount of a gas, how does the mean free path of its molecules depend on temperature at constant volume? 90.For a given amount of a gas, how does the mean free path of its molecules depend on pressure at constant temperature? 91.For a given amount of a gas, how does the mean free path of its molecules depend on volume at constant temperature? 92.For a given amount of a gas, how does the mean free path of its molecules depend on their size? A)Directly proportional to size.B)Inversely proportional to size.C)Independent of size.Use the following to answer questions 93-94:At a certain temperature the speeds of six gaseous molecules in a container are 2.0 m/s, 2.2 m/s, 2.6 m/s, 2.7 m/s, 3.3 m/s, and 3.5 m/s.93. Calculate the root-mean-square speed and the average speed of the molecules.