If 8.16 g of CuNO3 is dissolved in water to make a 0.500 M solution, what is the volume of the solution?

Answer 1

I wonder if you really meant CuNO3. I'll assume you did.

mols CuNO3 = grams/molar mass = ?
The M = mols/L solution. You know M and you know mols, solve for L solution.