You allow 4.78g of A and 10g of B to react to form C. Assuming you had a perfect reaction, how many grams of B would be leftover at the end of the reaction? A + 2B -> C

A = 202.0g/mole
B = 85.0 g/mole
C = 105 g/mole

If someone could send me the steps on how to solve this, that would be extremely helpful.

your picture is not part of the scientific method.

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.

just did the assignment and the answer was #1 +2 n