Problem: A sample of an unknown gas effuses in 11.1 min. An equal volume of H 2 in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas?

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FREE Expert Solution

Concept: Graham's Law of Effusion

Use the graham's law of effusion equation to find molar mass of unknown gas.

First will have to find the rate of effusion of each, since only times are given.

We will assume that we have 1 L of each gas, however you can pick any value for volume, as long as the two volumes are the same for both gases.

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Problem Details

A sample of an unknown gas effuses in 11.1 min. An equal volume of H 2 in the same apparatus under the same conditions effuses in 2.42 min. What is the molar mass of the unknown gas?

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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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Lin's class at VT.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.