Question

which would be considered an empirical formula?
o h₂o
o h₄n₈
o n₂h₄
o c₆h₈

Explanation:

An empirical formula gives the simplest whole - number ratio of atoms in a compound. For $H_2O$, the ratio of H to O is 2:1 and it is in the simplest whole - number ratio. For $H_4N_8$, the simplest ratio of H to N is 1:2 (dividing both by 4). For $N_2H_4$, the simplest ratio of N to H is 1:2 (dividing both by 2). For $C_6H_8$, the simplest ratio of C to H is 3:4 (dividing both by 2). $H_2O$ already represents the simplest whole - number ratio of its constituent atoms.

Answer:

$H_2O$