## Question

Calculate the concentration of nitric acid in moles per litre in a sample which has a density, 1.41 g ml^{–1}and mass per cent of nitric acid in it being 69%.

### Solution

15.44 M

Mass percent of 69% means that 100 g of nitric acid solution contain 69 g of nitric acid by mass.

Molar mass of nitric acid (HNO_{3}) = 1 + 14 + 48 = 63 g mol^{–1}

∴

Volume of 100 g nitric acid solution =

∴ Conc. Of HNO_{3} in moles per litre

#### SIMILAR QUESTIONS

A solution is prepared by adding 2 g of a substance A to 18 g of water. Calculate the mass percent of the solute.

The density of 3 M solution of NaCl is 1.25 g mL^{–1}. Calculate the molalityof the solution.

How many grams of NaOH should be dissolved to make 100 cm^{–3} of 0.15 M NaOH solution?

Calculate the number of oxalic acid molecules in 100mL of 0.02 N oxalic acid solution.

Calculate the molarity of water if its density is 100 kg/m^{3}

Calculate the percentage of cation in ammonium dichromate.

Calculate the percentage of water of crystallisation in the sample of blue vitriol (CuSO_{4}.5H_{2}O)

Calculate the mass of sodium acetate (CH_{3}COONa) required to make500mL of 0.375 molar aqueous solution. Molar mass of sodium acetate is 82.0245 g mol^{–1}.

How much copper can be obtained from 100 g of copper sulphate(CuSO_{4})? (Atomic mass of Cu =63.5amu)

What is the concentration of sugar if its 20 g are dissolved in enough water to make a final volume up to 2 L?