a solution is made by dissolving 25 g NaCl in enough water to make 1.0 L solution. Assume that density of the solution is 1.0 g/mL. calculate the mass percent, molarity, molality, and mole fraction of NaCl.

2 answers

Don't be coy. How much do you know how to do and exactly what do you not understand? I'm not working these so you can check your answer but I will be glad to help you through what you don't understand.
I responded below. mass percent is not right (should be 2.5%) but M and m are right.