1.What is the formula for finding percent water hydrates?

2. And what is molecular formula?

2 answers

It would be better to ask a specific question.
%H2O in a hydrate = [mass H2O/molar mass of hydrate]*100

A molecular formula tells the ratio of the atoms to each other in a compound. For example, in H2O, there are two H atoms to 1 O atom. This happens to be the empirical formula as well as the molecular formula. The molecular formula is some whole number times the empirical formula. In the case of H2O, the whole number is 1.0.
thank you!