Which is a balanced chemical equation?
a) c7h16 + 5o2 6co2 + 4h2o
b) c7h16 + 11o2 7co2 + 8h2o
c) c7h16 + 14o2 7co2 +5h2o
d) c7h16 + 22o2 14co2 + 16h2o

The correct answer is Option b.

Explanation:

All the balanced chemical equation follows law of conservation of mass.

This law states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another. In a chemical reaction, total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

From the given options:

Option a: Here, number of carbon and hydrogen atoms on reactant and product sided are not equal.

Option b:

On reactant side:

Number of carbon atoms = 7

Number of hydrogen atoms = 16

Number of oxygen atoms = 22

On product side:

Number of carbon atoms = 7

Number of hydrogen atoms = 16

Number of oxygen atoms = 22

Thus, this equation follows law of conservation of mass.

Option c: Here, number of hydrogen and oxygen atoms are not equal on reactant and product side.

Option d: Here, number of hydrogen and carbon atoms are not equal on reactant and product side.

Hence, the correct answer is Option b.