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Determine the mole fraction of nickel(II) chloride in a 5.54 M aqueous solution of nickel(II) chloride. The density of the solution is 1.28 g mL-1.
The mole fraction of an aqueous solution of magnesium sulfite is 0.29. Calculate the molarity (in mol/L) of the magnesium sulfite solution, if the density of the solution is 1.38 g mL-1.
Determine the mole fraction of magnesium bromide in a 5.51 M aqueous solution of magnesium bromide. The density of the solution is 1.17 g mL-1.