How do I determine the number of moles for the substance: 3.5 x 10^23 molecules H2O?

Answer 1

1 mol of anything has 6.02 x 10^23 molecules of (in this case) H2O. This must be close to a 0.5 mol but you need to do the exact arithmetic.

Answer 2

How do I determine the number of grams for the following Substance? 7.8 mol ZnSo4.

Answer 3

grams = mols x molar mass

Answer 4

How do I determine the number of grams for the following Substance? 7.8 mol ZnSo4