Consider the HF solution with the concentration 5%(w/v). Calculate its concentration in the molarity. Use four significant figures in the answer.

Answer 1

5% w/v means 5 g HF/100 mL soln or 50 g HF/1000 mL soln.
50g HF = how many mols? mols = grams/molar mass, then
M = moles/L