98. Solving a chemistry problem

A solution of substances A and B of a given concentration; the density of this solution at temperature T is equal to d: 1) determine the molar concentration - the number of moles of a solute in 1 liter of solution; 2) determine the molar concentration - the number of moles of a solute per 1 kg of solvent; 3) calculate the mole fraction of substance A in percent; 4) determine the number of moles of solvent per 1 mole of the solute.
N option Mass content Substance T,K d*10-3, kg/m3
A, % A B
5 80 CBr3CHO H2O 313 2.106