Explanation:

here we calculate everything in terms of mole.

so when we will calculate the moles of oxygen and carbon it will come out to be

oxygen=5/8

carbon=1/2

and by stoichiometry we can see that 1 mole of carbon requires 1 mole of oxygen to form 1 mole of carbon dioxide.so according to this basis 1/2 mole of carbon requires 1/2 mole of oxygen only rest amount of oxygen will be left in excess so then we can calculate the amount of oxygen remained and the amount of carbon dioxide produced