Question

Which substance is a compound?

water
gold
oxygen
hydrogen User: Which are limiting nutrients for plant growth?
water and nitrogen
nitrogen and carbon
carbon and phosphorus
phosphorus and nitrogen User: The ocean and the atmosphere serve as long-term storage areas for carbon and other nutrients. What are these storage areas called?
reservoirs
fossil fuels
biostorages
compounds

Answer 1

water and nitrogen.

Answer 2

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.