Question

and one oxygen atom.
what is the chemical formula for the substance composed of these molecules?
$c_2h_4o_2$ $ch_4o$ $c_2h_4o$

Explanation:

Step1: Analyze the molecule (acetaldehyde)

The molecule in question is acetaldehyde. Let's count the atoms: Carbon (C) atoms: 2, Hydrogen (H) atoms: 4, Oxygen (O) atom: 1.

Step2: Determine the chemical formula

Based on the atom counts, the chemical formula should be $C_2H_4O$.

Answer:

$C_2H_4O$ (corresponding to the option with formula $C_2H_4O$)