A student was asked to identify a sample of unknown hydrate. The student was provided with the following experimental data. [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.]
The student was provided with two reference compounds from which the student needs to identify the unknown: Cu(NO3)2. 3H2O and Cu(NO3)2. 6H2O. Answer the following.
A). Calculate percent water of hydration in the sample. (show your calculations)
B). Identify the formula of the hydrate.

Alice did an experiment to find the relationship between the angle at which a ray of light strikes a mirror and the angle at which the mirror reflects the light. she placed a ray box in front of a mirror. she changed the angle at which the light from the ray box struck the mirror and noted the corresponding angle at which the mirror reflected the light. which of the following is the dependent variable in this experiment? the mirror used to reflect the light the ray box used as the source of light angle at which the light from the ray box strikes the mirror angle at which the mirror reflects the light from the ray box