Well, we have to realize that we have 1 mol reacting in two moles. That means a theoretical yield of this guy is 1 mol. Because one to two gives you one of this guy and two of this guy. And 1 mol of carbon dioxide is simply well, we take our molecular weight of our carbon dioxide which is 12 grams/mol for carbon dioxide and 32 grams/mol for two oxygens and we get 32 plus twelve gives us 44 grams/mol. This is our molecular weight of carbon dioxide. So you multiply by 1 mol and we get the theoretical yield is 44 grams of carbon dioxide.