An aqueous soulution contains 30% c3h7oh and 70% water by mass. what are the mole fractions of each substance in the solution?

Mole fraction of water = 0.88

Mole fraction of = 0.12

Explanation:

30% means 30 g of is present in 100 g of solution.

70% (water) means 70 g of water is present in 100 g of solution

Calculation of MOLES

Molar mass of   = 18 g/mol

moles of water = 3.89 moles

Molar mass of   = 3(12) + 7(1) + 1(16) +1(1)

                                                                  = 36 +7+16+1

molar mass of = 60 g/mol

moles of  = 0.5 moles

total moles of solution = 0.5 + 3.89 = 4.39 moles

Calculation of MOLE FRACTION

Formula for mole fraction is :

Similarly,

Mole fraction of water = 0.88

Mole fraction of = 0.12

Note :