Question

The reaction between copper oxide and carbon can be used to make copper metal.

The equation for this reaction is:
2CuO(s) + C(s) → 2Cu(s) + CO2(g)
A mixture of 4.0 g of CuO and 1.2 g of carbon is heated.
Calculate the number of moles in 4.0 g of CuO

Answer 1

The molar mass of CuO is 63.55 g/mol for copper and 15.9994 g/mol for oxygen, giving a total molar mass of 79.55 g/mol.

To calculate the number of moles in 4.0 g of CuO, we can use the formula:

moles = mass / molar mass

moles of CuO = 4.0 g / 79.55 g/mol

moles of CuO = 0.0502 mol

Therefore, there are 0.0502 moles in 4.0 g of CuO.