Answer:
c I've taken chem 3 times
Explanation:
Photosynthesis will produce oxygen gas that will be taken up by humans for respiration. Respiration will produce carbon dioxide that will be taken up by plants for photosynthesis. So both waste products will be recycled and reused so therefore an example of zero waste world
( 6.50 mol * 17 mol * 1.0079g )/ 8 mol = 13.9 grams