What is the molecular formula of a compound that contains 10.0g carbon, 1.68g hydrogen, and 13.4g oxygen

CH2O

Explanation:

(view this on a laptop to avoid the spacing problems)

We can draw a chart to solve this:

                     Carbon                      Hydrogen                   Oxygen

mass(g)            10.0                            1.68                            13.4

no. of moles  10/12 = 0.83333      1.68/1 = 1.68            13.4/16=0.8375

ratio          0.83333/0.83333=1   1.68/0.8333≈2        0.8375/0.83333≈1

(divide by the smallest no. of mole- which is carbon)

Therefore, the molecular formula is CH2O.

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.