Determine the number of grams of water in 7.00 g of copper(II) sulfate pentahydrate.

Answer 1

The easy way;
determine the moles of copperII sulfate penathydrate in 5 grams.
moles=7.00/molmass=7.00/159.6

massofH2O=molesabove*5*18grams/mole

Answer 2

wow, okay. Thank you!