Question

What is a molar concentration in moles-liters of a solution made with 53 grams of Mg(NO3)2 dissolved in enough water to make 3 liters of solution?

Answer 1

The molar concentration of the solution is 0.119 mol/L.

Step-by-step explanation:

To calculate the molar concentration of a solution, we need to determine the number of moles of the solute (Mg(NO3)2) and the volume of the solution in liters. The molar mass of Mg(NO3)2 is 148.3 g/mol. Using the given mass of 53 grams, we can calculate the number of moles:

Moles of Mg(NO3)2 = 53 g / 148.3 g/mol = 0.3575 mol

Next, we divide the number of moles by the volume of the solution in liters:

Molarity = 0.3575 mol / 3 L = 0.119 mol/L

Therefore, the molar concentration of the solution is 0.119 mol/L.