I need help finding the molar mass of anhydrous salt.

Answer 1

There are many salts in chemistry. I assume you mean table salt. That is NaCl. How accurate should the number be? It is about 58.5. It is 58.4425 to four significant figures.

Answer 2

No, we are using copper sulfate pentahydrate. We are making the hydrate and anhydrate.

Answer 3

CuSO4.5H2O molar mass = 249.686
CuSO4 molar mass = 159.610