Which is the conjugate base in the following reaction

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

How have the greenhouse gasses increased from the year 2000 to 2018