If the r. m. s speed of chlorine molecule is 490 m / s at 27^° C, the r.m. s speed of argon molecules at the same temperature will be (Atomic mass of…

If the $\displaystyle \mathrm{r} . \mathrm{m} . \mathrm{s}$ speed of chlorine molecule is $\displaystyle 490 \mathrm{~m} / \mathrm{s}$ at $\displaystyle 27^{\circ} \mathrm{C}$, the r.m. s speed of argon molecules at the same temperature will be (Atomic mass of $\displaystyle \operatorname{argon}=39.9 \mathrm{u}$, molecular mass of chlorine $\displaystyle =70.9 \mathrm{u}$ )