how do you find the formula of dehydrated and hydrated sample?

Question

mass of copper : 1g
mass of hydrated sample: 2g
mass of dehydrated sample: 0.5 g
mass of water evolved: .01
moles of chlorine: 0.6

Answer 1

Look at the answer given to your earlier question about the cobalt chloride.

In this question, there must be some errors. The mass or your hydrated sample is given here as 2.0 grams, and the dehydrated sample is 0.5 grams. That means that 1.5 grams of water must have been removed from the sample, and not the 0.01 grams you give. Also, the moles of chlorine cannot be 0.6, because that would have a mass greater than the mass of your dehydrated sample.