If 0.4 moles of carbon are allowed to react with 0.6 moles of molecular oxygen, how many moles of CO2 are formed?

We know that for every mole of Carbon, we need 2 moles of oxygen to created Carbon Dioxide with every particle we have. So its a 1:2 ratio, carbon to oxygen

If we have 0.4 moles of carbon, we would need 0.8 moles of oxygen to maximize our carbon usefully, but we don't have that much oxygen. So, double down on oxygen, which is 0.3. So we can use 0.3 moles of carbon and 0.6 moles of oxygen to create 0.3 moles of CO2

(I am unable to provide the adequate chemical equation, I apologize if this is not what you are looking for)