Question

2co(g) + o2(g) → 2co2(g) starting with 4.07 moles of co, calculate the number of moles of co2 produced if there is enough oxygen gas to react with all the co.

Answer 1

2CO(g) + O2(g) → 2CO2(g)
from the reaction 2 mol 2 mol
from the problem 4.07 mol 4.07 mol

So 4.07 mol CO2 can be produced.