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Verified Answer :

Answer:

The correct answer is option 2.

Explanation:

Law of conservation of Mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that in a balanced chemical reaction total mass on the reactant side must be equal to the total mass on the product side.

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.The total energy of an  remains constant in a chemical  reaction,.

For example:

\(2H^++S^{2-}\rightarrow H_2S\)

Mass of reactants = \(2\times 1 g/mol + 1\times 32 g/mol = 34 g/mol\)

Mass of products = \((2\times 1 g/mol+1\times 32 g/mol)=34 g/mol\)

Charge on reactant side = Charge on product side

\(2\times (+1) +(-2)=0\)

\(0=0\)