138. Solving a chemistry problem

138. Solving a chemistry problem

1. 1 * 10-3 m3 of sodium bromide solution contains 0.3219 kg of NaBr. The density of the solution at 293 K is 1238.2 kg / m3. Express the concentration of the solution: 1) in moles of salt in 1 * 10-3 m3 of solution; 2) in moles of salt per 1 kg of water; 3) in molar fractions; 4) as a percentage; 5) in moles of water per mole of NaBr.