63.55 + 32.06 + (4 x 16) = 159.61 grams per mole. Divide the mass of your anhydrous (heated) salt sample by the molar mass of the anhydrous compound to get the number of moles of compound present. In our example, 16 grams / 160 grams per mole = 0.1 moles. read more
Sea salt (like used in the kitchen) this is made by evaporating the water from the salt water solution, so you are left with (almost) all the salt, but none of the water. The water still exists, i.e., there are the same number of molecules/moles of water somewhere, you have just moved it. This is true for anything. read more
molarity=moles of solute volume of solution (L) For example, 1 M HCl contains 1 mol of HCl dissolved in 1 L of the water. When a concentrated solution is diluted, the number of moles of solute stays constant; only the volume of the solution is changed. read more