Which of these is a balanced chemical equation?

option H

Explanation:

Balanced equation means that the no of atoms on both sides should be equal.

In H, Cl2 + 2NaBr> Br2 + 2NaCl

No of Cl atoms, 2=2

No of Br atoms, 2=2

And sodium atoms,2=2

Hence it is balanced equation

And remain are not balanced.

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

the answer is   c.) 1575 j.

explanation: