How could you make 300ml of a solution at a concentration of 10g nacl per 100 ml?

You would dissolve 30 g NaCl in enough water to make 300 mL solution.

Mass of NaCl = 300 mL solution × (10 g NaCl/100 mL solution) = 30 g NaCl.

by cartels in other countries, shipped by air, mail, or land. i cant really see your answer choices : /