Question

Copper (II) oxide can be heated until it decomposes into elemental copper and oxygen gas, If we know the moles of Copper (II) oxide produced, how many moles of elemental Cu would be formed in the decomposition of 2.000 grams of Copper (II) sulfate pentahydrate?

Answer 1

CuSO₄.5H₂O   ----------- > Cu

according to reaction   249.7 g CuSO₄.5H₂O    produce 63.55g Cu

                                        2 g       CuSO₄.5H₂O    produce    (63.55 x 2 ) / 249.7 = 0.51 g Cu will produce