a student heats a compound to constant mass and then leaves it sit out for a few hours. She comes back, remanded the sample and finds it has a greater mass than before. Explain how this could happen. ANY HELP IS MUCH APPRECIATED! :)

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

i think it's letter a.

answer: cellular respiration takes in food and uses it to create atp, a chemical which the cell uses for energy. usually, this process uses oxygen, and is called aerobic respiration. it has four stages known as glycolysis, link reaction, the krebs cycle, and the electron transport chain.