#### Answer

$C_9H_{13}NO_3$ is the formula of the Adrenaline molecule.

#### Work Step by Step

1. Count the number of gray spheres.
There are 9; therefore, this molecule has 9 carbons.
2. Do the same thing for the other colors:
There are 13 ivory spheres; therefore, adrenaline has 13 hydrogens.
There are 3 red spheres; therefore, adrenaline has 3 oxygens.
There is only 1 blue sphere; therefore, adrenaline has 1 nitrogen.