Hi how do I find out what the chemical formula of the unknown copper hydrate is if I have the numbers: 0.007 moles of water, 0.002 moles of copper, and 0.006 moles of chloride?

See your previous post. If you show your work and explain why you have trouble going forward I will try to help you finish but I'm not about to do all my work over. Follow the instructions I gave you previously. Here's the link.

https://www.jiskha.com/questions/1857228/how-do-i-determine-the-empirical-formula-determination-of-cu-cl-and-h2o-in-grams-grams