What weight of copper(II) oxide, CuO, would theoretically be produced from 1.623 grams of copper? (mol. masses Cu = 63.55; O = 16.00)

Answer 1

1.623 g is how many mols.
1.623/atomic mass Cu.

1 mole CuO = 1 mole Cu; therefore, moles CuO is same as mols Cu.
Then moles CuO x molar mass CuO = grams CuO.

Answer 2

Weigh of testube of bung =16.8g and copper 2 oxide