Answer
The chemical formula for lactic acid is $C_3H_6O_3$
Work Step by Step
1. Count the number of times each element appears in the structure:
C: 3 carbons.
H: 6 hydrogens.
O: 3 oxygen.
2. Write each symbol in alphabetical order, followed by the number of times it appears (If the number is equal to 1, you don't need to represent it):
$C_3H_6O_3$
