What volume of a 0.550 M solution of potassium hydroxide can be made with 18.3 g of potassium hydroxide? (Ignore significant figures for this problem.)
mols KOH = grams/molar mass =
18.3/approx 56 = approx 0.33 but you need a more accurate number.
Then M = mols/L solution. You know M and mols, solve for L.