The coefficient that belongs in front of O2 in the following reaction C3H8 + O2 -> CO2 + H2O is 5.
A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation is the same.
According to this question, the following chemical equation is given:
C3H8 + O2 -> CO2 + H2O
To balance the above equation, one has to ensure that the number of atoms of carbon, hydrogen and oxygen are the same on both sides of the equation.
Hence, we make use of numbers placed in front of a compound called coefficient.
The balanced equation is as follows:
C3H8 + 5O2 → 3CO2 + 4H2O
Therefore, the coefficient that belongs in front of O2 in the following reaction C3H8 + O2 -> CO2 + H2O is 5.
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