CH4 + 2 O2 → CO2 + 2 H2O
What’s the total energy

80.2114/mol

Explanation:

that is the answer that I got using my chemistry calculator so I hope it works for your question.

Explanation:

An endothermic reaction occurs in a chemical cold pack. If you mix methane and oxygen together, a reaction isn't a straight away reaction. There is a barrier to the reaction. This barrier is due to the fact that to make CO2 and H2O break 4 carbon-hydrogen bonds and some oxygen-oxygen bonds.

the answer is barium and copper bromide

hypostyle hall;