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. So now we follow our formula. We take our 38 grams our actual yield that we found from the experiment divide that by our 44 grams, our theoretical yield. This guy multiply that by 100% to find a percentage and we find that our percent yield is 86.4%.