Chapter 2 - Atoms, Molecules, and Ions - Worked Example - Page 58: 16

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

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.