Calculate the molarity 10% nitric acid by mass whoose density 1.5gm/ml also calculate it's molality

Answer 1

Molarity is mass conc. ( gm/ml) divided by molar mass or mol.wt (gm/mol). Convert your mass conc gm/L...becomes 1500 gm/L. With 10% nitric acid, 0.1 x 1500 gm/L = 150 gm/L.

1. We know Molar mass of HNO3 = 63.01 g/mol.
2. Molarity = 150 gm/l / 63.01 g/mol = 2.38 Mol/L (M)

Molality is # of moles per kg of solvent. Therefore. 10 g of HNO3 in 90g of Water for a 100g solution.

90g of water is equivalent to 0.09kg of water.