Question

Consider the adjacent diagram. Initially, flask `A` contained oxygen gas at `27^(@)C` and `950 mm` of `Hg`, and flask `B` contained neon gas at `27^(@)C` and `900 mm`. Finally, two flask were joined by means of a narrow tube of negligible volume equipped with a stopcock and gases were allowed to mixup freely. The final pressure in the combined system was found to be `910 mm` of `Hg`.

Which of the following statements concerning oxygen and neon gas is true in the begining, when the stopcock was just opened?
A. `O_(2)` moved at faster rate toward flask `B`.
B. `Ne` moved at faster rate towards flask `A`.
C. Both `O_(2)` and `Ne` gases moves at equal rate.
D. Insufficient information to compare the rate of effusion.

Answer 1

At `t=0`, `(r_(O_(2)))/(r_(Ne))=(rho_(O_(2)))/(rho_(Ne))sqrt((M_(Ne))/(M_(O_(2))))=(950)/(900)sqrt((20)/(32))lt1`
Therefore, `Ne` will diffuse at faster rate.