If you added excess NaCl to a 200mL sample of water from the same source, how many grams of AgCl solid would you expect to form?

The molecules contain like 54 of water 

The teacher is mostly talking about the distillation of a mixture

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water