Answer:
Density = 1000 g/l
= 1.00 kg/l.
Molality = 0.037 mol/g
= 37 mol/kg.
Explanation:
Molar concentration of nitric acid = 15.9 M.
Mass of water in 100 g = 100 - 70
= 30 g
Mass of nitric acid = 70 g
Molar mass of HNO3 = 1 + 14 + (16*3)
= 63 g/mol
Number of moles = mass/molar mass
= 70/63
= 1.11 mol.
Molar concentration = number of moles/volume
Volume = 1.11/15.9
= 0.07 l
Density = mass/volume
Density =
= 70 * 0.07
= 1000 g/l
= 1.00 kg/l
Molality = number of moles of nitric acid/mass of solvent(water)
= 1.11/0.030
= 37 mol/kg
