# Problem: A sample of N2 gas is contaminated with a gas (A) of unknown molar mass. The partial pressure of each gas is known to be 200 Torr at 25°C. The gases are allowed to effuse through a pinhole, and it is found that gas A escapes at three times the rate of N2. The molar mass of gas A is: a) 3.11 b) 252 c) 84.0 d) 9.33 e) none of these

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A sample of N2 gas is contaminated with a gas (A) of unknown molar mass. The partial pressure of each gas is known to be 200 Torr at 25°C. The gases are allowed to effuse through a pinhole, and it is found that gas A escapes at three times the rate of N2. The molar mass of gas A is:

a) 3.11

b) 252

c) 84.0

d) 9.33

e) none of these

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Effusion concept. You can view video lessons to learn Effusion. Or if you need more Effusion practice, you can also practice Effusion practice problems.

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Our tutors rated the difficulty ofA sample of N2 gas is contaminated with a gas (A) of unknown...as medium difficulty.

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Based on our data, we think this problem is relevant for Professor Li's class at UW-SEATTLE.