If 250 ML of Methane,CH₄,effuses Through a Small Hole in 20

Multiple Choice

If 250 mL of methane,CH₄,effuses through a small hole in 20 s,the time required for the same volume of helium to pass through the hole under the same conditions will be

A) 40 s.
B) 5 s.
C) 1.3 s.
D) 10 s.
E) 80 s.