What is the concentration of nitrate ion in a 425 mL solution containing 32.0 g of Mg (NO3) 2 (M = 148.3) ?

There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. Calculations are as follows:

Molarity of NO3 ion = 32.0 g Mg (NO3) 2 (1 mol / 148.3 g) (2 mol NO3 / 1 mol Mg (NO3) 2) /.425 L

MOlarity of NO3 ion = 1.02 M