A research chemist prepares a standard non-aqueous electrolyte solution by dissolving 7.5 g of an active organic salt (relative molecular mass 150.0) in 50.4 g of an organic solvent (relative molecular mass 84.0).
What is the mole fraction of the organic salt in this solution?
3.2×10−23.2 \times 10^{-2}3.2×10−2
7.7×10−27.7 \times 10^{-2}7.7×10−2
8.3×10−28.3 \times 10^{-2}8.3×10−2
1.3×10−11.3 \times 10^{-1}1.3×10−1