The Mole Fraction of He in a Gaseous Solution Prepared

Multiple Choice

The mole fraction of He in a gaseous solution prepared from 1.0 g of He,6.5 g of Ar,and 10.0 g of Ne is ________.

A) 0.28
B) 0.25
C) 0.20
D) 0.66
E) 0.86