Question

What is the molarity of a solution made by dissolving 2.50 g of NaCl in enough water to make a 200 mL solution?

Answer 1

$\nu=m/M=2.5/58=0.043 mole$

$C_m=\nu/V_{sol} =0.043/0.2=0.215 M$

Answer: 0.215 M.