A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. Student was provided with two reference compounds from which student needs to identify the unknown: Cu(NO3)2 . 3H2O and Cu(NO3)2 . 6H2O . Answer the followings. a. Calculate percent water of hydration in the sample. (show your calculations) b. Identify the formula of the hydrate. 3.51 g sample of the hydrate when heated loses water completely and the mass of the residue was found to be 2.22 g.