1. The problem statement, all variables and given/known data Lab Experiment: I added 5g of Cu2CO3(OH)2 in a bunsen burner and the resultant was a black product weighing 3.327g, representing a mass ratio of 0.67/1.0 2. Relevant equations The question is whether the remaining black compound is anhydrous copper carbonate hydroxide molecule (Cu2CO3(OH)2 whose molecular weight is 221.116g/mol while that of water is 18.015 g/mol. What would be the equation for the decomposition of copper carbonate hydroxide hydrate ( I will try to balance it myself). 3. The attempt at a solution I believe its CuO but how can show that its not?