PhysicsMedium251×since 2002Q7419If the r. m.s speed of chlorine molecule is 490 m/s490 \mathrm{~m} / \mathrm{s}490 m/s at 27∘C27^{\circ} \mathrm{C}27∘C, the r. m. s speed of argon molecules at the same temperature will be (Atomic mass of argon =39.9u=39.9 \mathrm{u}=39.9u, molecular mass of chlorine =70.9u=70.9 \mathrm{u}=70.9u )A451.7 m/s451.7 \mathrm{~m} / \mathrm{s}451.7 m/sB751.7 m/s751.7 \mathrm{~m} / \mathrm{s}751.7 m/sC551.7 m/s551.7 \mathrm{~m} / \mathrm{s}551.7 m/sD651.7 m/s651.7 \mathrm{~m} / \mathrm{s}651.7 m/sCheck answerSkip