A 205 −mL sample of ocean water contains 6.9 g of NaCl?

Question

What is the molarity of the solution with respect to NaCl?

Answer 1

6.9 g NaCl x 1 mol/58.5 g =0.118 moles

molarity = moles/liter = 0.118 moles/0.205 liter

molarity= 0.576 M = 0.58 M (2 sig.figs.)