Question

Chlorine occurs as a mixture of two isotopes, 35Cl and 37Cl. What is the ratio of the diffusion rates of the three species (35Cl)2, 35Cl37Cl, and (37Cl)2?

(b) The lunar surface reaches 370 K by midday. The atmosphere consists of neon, argon and traces of helium at a total pressure of only 2 x 10-14 atm. Calculate the root mean square speed of each component in the lunar atmosphere.

Answer 1

$a) ^{35}Cl=77.5\%$

$^{37} Cl=22.5\%$

b) $Vrms_{Ne} =676.24m/s$

$Vrms_{Ar} =480.63m/s$

$Vrms_{He} =1518.93m/s$