What is the number of moles of copper oxide in 7.95g copper oxide?

To find the number of moles, you need to divide the mass of copper oxide by its molar mass. The molar mass of copper oxide (CuO) is approximately 79.55 g/mol. Therefore, 7.95g of copper oxide is equal to 0.1 moles (7.95g / 79.55 g/mol).