The molecule for sugar is sucrose which is made of fructose and glucose molecules. Glucose and fructose are types of sugar. They are made of carbon, hydrogen, and oxygen. The chemical composition for sucrose is C12H22O11. I picked sugar because a lot of foods have sugar in it like ice cream, cookies, bread, and rice and I eat it a lot. Glucose is important to the world because it gives you energy, and the energy you get helps you to move around. Glucose is an energy source in living organisms and is a component of many carbohydrates. The energy will not last long, but you will get some of it. Every time you eat sucrose (sugar), you might get a stomach ache from eating too much of it. I eat a lot of sugar and sometimes get stomach aches.