Which of the following best explains the Law of Conservation of Mass? Group of answer choices:

A. In a chemical reaction the mass of the products is less than the reactants mass.

B. In a chemical reaction the mass of the products cannot be determined from the mass of the reactants.

C. In a chemical reaction mass of products always equals the mass of reactants.

D. In a chemical reaction the mass of the products is greater than the mass of reactants

A

Explanation:

When a reaction happens some of the reactants mass is released as energy so the mass of the product would be less

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.