At What Temperature Is the Rms Speed of Hydrogen Molecules,H₂,which

Multiple Choice

At what temperature is the rms speed of hydrogen molecules,H₂,which have a molecular weight of 2.02 g/mole,equal to 2.0 km/s? The Boltzmann constant is 1.38 × 10^-23 J/K and N_A = 6.022 × 10²³ molecules/mol.

A) 17°C
B) 34°C
C) 51°C
D) 68°C
E) 72°C