Commercial nitric acid is 16.0 M HNO₃(aq)and has a density of 1.42 g/mL.What is the mole fraction of HNO₃ in this solution?

Question

Quizplus · Accepted Answer

To find the mole fraction of HNO3, first calculate the mass of 1 L of solution using its density (1.42 g/mL). Then, find the mass of HNO3 using its molarity (16.0 M) and molar mass (63.01 g/mol). Subtract the mass of HNO3 from the total mass to find the mass of water. Convert these masses to moles and use the formula for mole fraction: moles of HNO3 divided by total moles. The calculation gives a mole fraction of approximately 0.412.

Commercial Nitric Acid Is 16