The answer for the first question would be water. It is the substance that is a compound since it is made up of different elements. For the second item, i think the best answer is phosphorus and nitrogen. They are the limiting nutrients. For the last item, the correct answer is reservoirs.
Upper Body Circulation
The superior vena cava is the large vein that brings blood from the head and arms to the heart, and the inferior vena cava brings blood from the abdomen and legs into the heart.
Silver nitrate, another product of the reaction, can stain your skin. After the silver has dissolved, you will add hydrochloric acid solution to precipitate silver ions as silver chloride.
Answer:
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