Calculate the mole fraction of nitric acid of a 18.6% (by mass)aqueous solution of nitric acid.
A)0.0484
B)0.0508
C)0.0967
D)0.0242
E)The density of the solution is needed to solve the problem.

Question

Quizplus · Accepted Answer

The mole fraction of nitric acid can be calculated using the formula:Mole fraction of nitric acid = (Mass of nitric acid / Molar mass of nitric acid) / (Total mass of solution / Molar mass of water)Given that the solution is 18.6% (by mass) aqueous solution of nitric acid, we can assume 100 g of the solution. Therefore, the mass of nitric acid in the solution is 18.6 g.The molar mass of nitric acid is 63 g/mol and the molar mass of water is 18 g/mol.Substituting these values into the formula, we get:Mole fraction of nitric acid = (18.6 g / 63 g/mol) / (100 g / 18 g/mol) = 0.0484Therefore, the mole fraction of nitric acid is 0.0484.

Calculate the Mole Fraction of Nitric Acid of a 18