a sample of an unknown gas effuses in 11.1 minute. an equal volume of H2 in the same apparatus...?

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a sample of an unknown gas effuses in 11.1 minute. an equal volume of H2 in the same apparatus...?

at the same temprature. and pressure effuses in 2.42 minutes. what is the moral mass of the unknown gas?

2007-03-21 07:48:07 · 1 answers · asked by unknown 1 in Science & Mathematics ➔ Chemistry

1 answers

The rate of diffusion is inversely proportional to the molecular mass. So 11.1/2.42 = 4.59. The the unknown gas has 4.59 the mass of H2, which is 2g/mole. So the unknown gas has a molecular weight of 9.17. Within experimental error, it looks like neon.

2007-03-21 07:56:00 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋