Question

calculate the concentration of nitric acid in moles/litre and the mass present of nitric acid in it being 69%.

Answer 1

69% of nitric acid is present in 1L solution.

Mass of nitric acid = 69/100 *63 = 43.47g ,here 63 is the molar mass

Moles of nitric acid = 43.47/63 = 0.69moles

Therefore, concentration is 0.69 moles/L.