A chemist needs 3 moles of, O2 gas for a particular experiment. How many liters of O2 should she use?

If the same amount of cacl2 is added to equal volumes of water and maple syrup, which will have the higher temperature?

Nuclear fusion is the source of energy for stars. besides hydrogen, which other element is most likely also common in stars?

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?