Methane, CH4, burns in oxygen gas to form water and carbon dioxide. What is the correct balanced chemical equation for this reaction?

A. CH4 + O → H2O + CO2
B. CH4 + 4O → 2H2O + CO2
C. CH4 + O2 → H2O + CO2
D. CH4 + 2O2 → 2H2O + CO2

1D

2B
3D
4C
100% Correct

The correct answer is D.

It's D. Just took the test. Thank me later.

Zolita is correct!!

thanks Zolita!:)

Zolita is right!!!

As of 2018. Zolita, is still correct.

To balance the chemical equation, you need to make sure that there is an equal number of atoms of each element on both sides of the equation. Here's how you can do it step by step:

1. Start by counting the number of atoms on each side of the unbalanced equation.
On the left side, you have 1 carbon (C) and 4 hydrogen (H) atoms from CH4.
On the right side, you have 1 carbon (C) atom from CO2 and 2 hydrogen (H) atoms from H2O.
You also have oxygen (O) atoms present, but they can be balanced at the end.

2. Balance the carbon (C) atoms by adding coefficients in front of the molecules.
Since there is 1 carbon (C) atom on the left and 1 carbon (C) atom on the right, add a coefficient of 1 in front of CO2.

Balanced so far: CH4 + O2 → H2O + CO2

3. Balance the hydrogen (H) atoms by adding coefficients to the appropriate molecules.
Since there are 4 hydrogen (H) atoms on the left and only 2 hydrogen (H) atoms on the right, add a coefficient of 2 in front of H2O.

Balanced so far: CH4 + O2 → 2H2O + CO2

4. Now, let's balance the oxygen (O) atoms.
On the left side, you have 2 oxygen (O) atoms from O2, and on the right side, you have 4 oxygen (O) atoms from 2H2O and CO2.
Since the number of oxygen (O) atoms is not equal on both sides, you need to balance them.

You can balance the oxygen (O) atoms by adding a coefficient of 2 in front of O2.

Finally, the balanced equation is:
CH4 + 2O2 → 2H2O + CO2

Therefore, the correct balanced chemical equation for the reaction is option D: CH4 + 2O2 → 2H2O + CO2.

I've never heard of a class called "help" before, but if you put your REAL subject in the School Subject box, it would sure help.

You also need to indicate which you think the correct answer is. Then someone is more likely to help you.

the answer is A.