Question #67a4c

1 Answer
Dwight
Feb 8, 2018

The mole fraction of He is #1.06/3# and 0.353 as a decimal.

Explanation:

Mole fraction is defined as

#("moles of one component")/("total moles of all components")#

In this case, we have 1.06 mol He and a total of 3 moles of all gases combined.

So, the mole fraction of He is #1.06/3#

One can leave it in fraction form, or as a decimal 0.353 (repeating).

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