Question

a vessel contains three gases at these partial pressures: 100 torr oxygen, 300 torr helium, 200 torr neo

Quiz: Quiz 13 - Gases - wageman mall.jc.edu - Tyler Junior Col Untitled D Question 4 12.5 pts A vessel contains three gases at these partial pressures: 100 torr oxygen, 300 torr helium 200 torr neon The mole fraction of helium is none of these 0.50 0.10 0.17 0.33 12.5 pts Question 5 o fthroomses has a total pressure of 1.380 mmHg at 298 K. The mixture is analyzed and is

Answer 1

The partial of gases are given;

Po​​​​​2​ = 100 torr

P​​​​​​He = 300 torr

& P​​​​​​Ne = 200 torr

So, P​​​​​​total = ( 100+300+200) torr

= 600 torr

We know that

P total = X​​​​​i* P​​​​​​i

here, X​​​​​​i = mole fraction of gas i

P​​​​​​i = partial pressure of gas i

Thus with help of above equation, the mole fraction of helium can be calculated as

X​​​​​​He​ = P​​​​​He/ P​​​​total

= 300 torr / 600 torr

= 0.5

Correct answer: (b)