If there are 0.625 g of NaCl left in a beaker that originally contained 75.0 mL of saltwater, what must have been the molar concentration of the original solution? The molar mass of NaCl is 58.44 g/mol.

Question

If there are 0.625 g of NaCl left in a beaker that originally contained 75.0 mL of saltwater, what must have been the molar concentration of the original solution?  The molar mass of NaCl is 58.44 g/mol.

DrBob222 · Answer

Didn't I do this for you last night? At your original post? mols NaCl = grams/molar mass Then M = mols/L