A sample of br2 (g) takes 48.0 min to effuse through a membrane. how long would it take the same number of moles of ar (g) to effuse through the same membrane?

Question

Chemistry

Anaya Mata

3 February, 20:43

A sample of br2 (g) takes 48.0 min to effuse through a membrane. how long would it take the same number of moles of ar (g) to effuse through the same membrane?

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Answers (1)

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Ramon Bryan · Answer 1

From the periodic table:

mass of Br = 79.9 grams

mass of Ar = 39.9 grams

Therefore,

molar mass of Ar = 39.9 grams

molar mass of Br2 = 2 (79.9) = 159.8 grams

Now,

time for Ar / time for Br2 = sqrt (molar mass of Ar / molar mass of Br2)

time for Ar = 48 * sqrt (39.9 / 158.9)

time for Ar = 24.0528 minutes