Use the equation to answer the question.

Question

CH4 + 2O2 → CO2 + 2H2O

If you change2O2
to a 3O2
, what will be the change in the results on the right side of the equation.

(1 point)
Responses

Nothing changes in the equation.
Nothing changes in the equation.

There are now 3H2O
molecules.
There are now 3 cap h sub 2 cap o molecules.

There are now 3CO2
molecules.
There are now 3 cap c cap o sub 2 molecules.

There is an extra O2
molecule left over.

Answer 1

In the original equation:

CH4 + 2O2 → CO2 + 2H2O

If you change 2O2 to 3O2, the equation becomes:

CH4 + 3O2 → CO2 + 2H2O

In this case, the change in reactants does not alter the number of products formed because the reaction is still consuming methane (CH4) and producing carbon dioxide (CO2) and water (H2O). However, changing to 3O2 means there will be one extra O2 molecule left over since only 2O2 are required to completely react with 1 CH4.

Thus, the correct response is:

There is an extra O2 molecule left over.