The Mole Fraction of He in a Gaseous Solution Prepared

Multiple Choice

The mole fraction of He in a gaseous solution prepared from 3.0 g of He, 6.5 g of Ar, and 10.0 g of Ne is __________.

A) 0.53
B) 0.75
C) 0.20
D) 0.66
E) 0.86