How much copper do you need to take to get 16 g of copper oxide (||)? How much oxygen is required for this reaction?

2Cu + O2 = 2CuO.
1) Find the amount of copper oxide substance. To do this, divide the mass of the oxide by its molar mass: 16/80 = 0.2 mol.
2) According to the reaction equation, for 2 mol of copper there are two mol of copper oxide. This means that the amount of pure copper substance is 0.2 mol.
3) The mass of copper is: 0.2 * 63 = 12.6 g.
4) According to the reaction equation, there is one mole of oxygen for 2 mol of copper oxide. This means that the amount of oxygen is: 0.2 / 2 = 0.1 mol.
5) The mass of oxygen is: 0.1 * 16 = 1.6 g.
Answer: The mass of copper is 12.6 g, the mass of oxygen is 1.6 g.