If 5.6 g of Copper (II) oxide are used, how many moles of copper metal will be produced?

When copper (ii) oxide is heated in presence of hydrogen gas it produces copper metal and water vapor.

that is

CuO + H2 = Cu + H2O

The moles of copper metal produced is calculated as below

find the moles of CUO used

moles = mass/molar mass

=5.6/79.5 = 0.07 moles

by use of mole ratio between CUO:Cu which is 1:1 the moles of Cu is also

=0.007 moles of Cu