Which of these chemical equations is correctly balanced?
a. mno4 + 2 c2h2o4 mn + 2 co2 + 4 h2o
b. mno4 + 3 c2h2o4 mn + 6 co2 + 4 h2o
c. mno4 + 4 c2h2o4 mn + 8 co2 + 4 h2o
d. mno4 + 6 c2h2o4 mn + 12 co2 + 12 h2o

The correct answer is Option C.

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. Total mass on the reactant side will always be equal to the total mass on the product side.

Every balanced chemical reaction follows law of conservation of mass.

From the given options, only option is balanced, which is Equation C.

Equation C:  

On reactant side:

The number of Manganese atoms are 1, number of oxygen atoms are 20, number of carbon atoms are 8 and number of hydrogen atoms are 8.

On product side:

The number of Manganese atoms are 1, number of oxygen atoms are 20, number of carbon atoms are 8 and number of hydrogen atoms are 8.

Thus, the above equation is balanced chemical equation and the correct answer is option C.

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.