Assume That a Container Is Filled with a Mixture of SO₃

Multiple Choice

Assume that a container is filled with a mixture of SO₃ and Ne. The molecular weight of SO₃ is 80 g/mol and the atomic weight of Ne is 20 g/mol. The average velocity of an SO₃ molecule is:

A) one-fourth that of a Ne atom.
B) one-half that of a Ne atom.
C) the same as a Ne atom.
D) two times that of a Ne atom.
E) 4 times that of a Ne atom.