5examples of a combustion reactions.

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?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring