Question

What needs to be done to balance this equation?

Question 4 options:

Do nothing (equation is balanced).


Change O 2 to O 4 on the left side of the equation.


Add coefficient 2 to O 2 on the left side of the equation.


Remove coefficient 2 in front of H 2O on the right side of the equation.

Answer 1

Add the coefficient 2 to O2 on the left side of the equation. (O2 represents a molecule of oxygen gas)

The equation shows an equal number of H atoms and C atoms on either side, but the number of O atoms must also balance.