Thank you for reporting, we will resolve it shortly
Q.
What is the average speed of a molecule, having a molecular mass of $529.5 \,g \,mol ^{-1}$. At temperature $100 \,K$
States of Matter
Solution:
$u_{ av }=\sqrt{\frac{8 R T}{\pi M}}, T=100 K ; M=529.5\, g\, mol ^{-1}$
$=\sqrt{\frac{8 \times 8.314 \times 100}{3.14 \times 529.5}}=2$
$\therefore$ Average speed of molecule is 2 or (b)