Which of the following contains chemical energy? a.) atoms that in motion b.) the nucleus of an atom c.) a bond between two atoms d.) the electrons of an atom

Correct option is C.

Explanation: Chemical energy is the energy which is related to the chemical bonds of atoms and molecules. It is released in the chemical reaction.

Option A is related to the kinetic energy of the atom because the atom is in motion.

Option B is related to the nuclear energy of the atom as it is explaining about the nucleus of the atom.

Option C is related to the chemical energy of the molecule as there is the formation of a bond between two atoms.

Option D is related to the kinetic energy of the atom as we know that the electrons are in constant motion.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

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