Which equation represents the reaction of sulfur with oxygen to form sulfur trioxide?
a. 2s + 3o2 --> 2so3
b. s + o --> so3
c. 3s + o2 --> so3
d. 6s + 3o2 --> 2so3

The correct answer is Option A.

Explanation:

All the balanced chemical equations follow Law of conservation of mass. This law states that the total number of individual atoms present on the reactant side is always equal to the total number of individual atoms present on the product side.

The balanced chemical equation for this reaction follows:

By Stoichiometry of the reaction:

2 moles of sulfur reacts with 3 moles of oxygen gas to produce 2 moles of sulfur trioxide.

Hence, the correct answer is Option A.

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.