What Is the Root-Mean-Square Speed of Chlorine Gas Molecules at a Temperature

Multiple Choice

What is the root-mean-square speed of chlorine gas molecules at a temperature of 320 K? (R = 8.31 J/mol*K,N_A = 6.02 x 10²³,and the molecular mass of Cl₂ = 71)

A) 1.7 x 10² m/s
B) 3.4 x 10² m/s
C) 0.8 x 10⁴ m/s
D) 1.1 x 10⁵ m/s