The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Argon, or 39.948 grams.
The answer is A. Putting the aquarium in the dark means that
the aquatic plants will not be able to photosynthesize. The process of photosynthesis produces oxygen
as a by-product. The oxygen is used by the fishes in respiration and release
carbon dioxide. The carbon dioxide is used by the aquatic plants in photosynthesis.
What grade u in? Because I wanna help u man
