Examine the unbalanced equation.

ch4 + o2 → co2 + h2o

what is the best classification for the unbalanced equation's reaction, and why?

it is a combustion reaction, because carbon dioxide (co2) is emitted as a product.
it is a combustion reaction, because oxygen (o2) reacts with a substance.
it is a synthesis reaction, because o2 combines with ch4 to create a new substance.
it is a synthesis reaction, because o2 displaces carbon (c) and hydrogen (h).

The correct answer is: It is a combustion reaction, because oxygen reacts with a substance.

Explanation:

Combustion reaction defined as chemical reaction which hydrocarbon reacts with oxygen molecule to give water, carbon dioxide and heat as a product.

Here in the give reaction methane is undergoing combustion reaction in presence of oxygen to give water and carbon dioxide.The balanced chemical reaction is given as:

Whereas in synthesis reaction is type of chemical reaction in which two more reactant reacts together to form a single product.

A + D +C → D

the answer is 1 i believe

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.