Adrenaline contains 13 hydrogen atoms, 9 carbon atoms, 3 oxygen atoms, and 1 nitrogen atom. what is the chemical formula for adrenaline?

A given compound is composed of atoms that combine in a definite proportion or ratio. A chemical formula is a way of representing the combination of different atoms and provides information about the number of atoms present in the molecule.

The given compound adrenaline contains:

13 hydrogen (H) atoms

9 carbon (C) atoms

3 oxygen (O)  atoms

1 nitrogen (N) atoms

Hence the chemical formula of adrenaline is:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.