For chlorine gas, what effect does raising the temperature from 250 K to 500 K have on the fraction of molecules moving faster than 700 m/s?
a) The fraction doubles exactly because the temperature doubles.
b) The fraction cannot be predicted without knowing the molar mass of Cl₂.
c) The fraction increases because more molecules attain higher kinetic energies.
d) The fraction decreases because the rms speed increases, moving most molecules into the new peak of the distribution.