Chemistry of Solutions: Webwork Question concerning moles and grams.?

You would like to make up 455 mL of a 0.35 M solution of ZnSO4·7H2O. How many moles of the salt do you need? (Unit is mol) 0.159 mol How many grams of the salt do you need? (Unit is g) By doing a rule of three, I found that you need approximately 25.67 grams of ZnSO4. But for some reason it tells me the... show more You would like to make up 455 mL of a 0.35 M solution of ZnSO4·7H2O.
How many moles of the salt do you need? (Unit is mol)
0.159 mol

How many grams of the salt do you need? (Unit is g)

By doing a rule of three, I found that you need approximately 25.67 grams of ZnSO4. But for some reason it tells me the answer is wrong...
2 answers 2