Balancing an equationRunning
Reaction vessel. Oxygen molecules at 5.5 O₂. Oxygen atoms supplied 11.04 atoms, Oxygen atoms needed 4 atoms. Currently oxygen atoms supplied is over by 7.04 atoms.TUNINGREACTANTSPRODUCTSACTIVATION PATH5.5 O₂
t = 0.0s

Oxygen atoms supplied

11.04atoms

Oxygen atoms needed

4atoms

5.5 O₂

Reaction vessel. Oxygen molecules at 5.5 O₂. Oxygen atoms supplied 11.04 atoms, Oxygen atoms needed 4 atoms. Currently oxygen atoms supplied is over by 7.04 atoms.

What has to balanceCH4+xO2CO2+2H2O\text{CH}_4 + x\,\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}

What is happening

You are called to a burner rig being set for complete combustion.

Carbon monoxide is coming out of the flue. Burning one methane molecule releases four oxygen atoms into the products, and the oxygen supply coefficient on the rig is wrong.