Question

What is the concentration (w/w %) if 75.0 grams of magnesium nitrate are combined with 500.0 mL of water?

Answer 1

concentration is defined as mols / L of solution
First, you need to get moles.
then convert 500.0 mL of water to L

Then divide moles by volume.

to get moles, you need to divide by the molar mass of Magnesium nitrate. you can refer to ur periodic table to calculate the molar mass.

Answer 2

Thank you. that helped a lot.