Balance the reaction below
__ C2H4 + ___ O2 → ___ CO2 + ___ H2O

Hey there!

C₂H₄ + O₂ → CO₂ + H₂O

First let's balance C.

There are 2 on the left and 1 on the right. So, let's add a coefficient of 2 in front of CO₂.

C₂H₄ + O₂ → 2CO₂ + H₂O

Next let's balance H.

There are 4 on the left and 2 on the right. So, let's add a coefficient of 2 in front of H₂O.

C₂H₄ + O₂ → 2CO₂ + 2H₂O

Lastly, let's balance O.

There are 2 on the left and 6 on the right. So, let's add a coefficient of 3 in front of O₂.

C₂H₄ + 3O₂ → 2CO₂ + 2H₂O

Here is our final balanced equation.

Hope this helps!

"the periodic table is arranged in order of atomic number."