Problem: A sample of helium effuses through a porous container 7.70 times faster than does unknown gas X. What is the molar mass of the unknown gas? 1. 129.96 2. 153.76 3. 169.0 4. 112.36 5. 190.44 6. 237.16 7. 275.56 8. 392.04 9. 201.64 10. 368.64

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Problem Details

A sample of helium effuses through a porous container 7.70 times faster than does unknown gas X. What is the molar mass of the unknown gas?

1. 129.96

2. 153.76

3. 169.0

4. 112.36

5. 190.44

6. 237.16

7. 275.56

8. 392.04

9. 201.64

10. 368.64

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