Challenge Problem 1: In the combination reaction of H₂ and O₂ to produce water, if you have 3 moles of hydrogen and 4 moles of oxygen, what mass of water is created? Is there anything left over? _ H₂ + _O₂ + _H₂O

the answer is learned

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

they are all solids.