Two iron oxide samples are given to you where one is red and the other is black. you perform a chemical analysis and you find that the red sample has a fe/o mass ratio of 2.327 and the black has a fe/o mass ratio of 3.491. you suspect the red sample is simple rust or fe2o3. what is the chemical formula for the black sample?

Chemical formula for the black iron oxide sample is FeO

Explanation:

Given:

Mass ratio of black iron oxide sample, Fe/O = 3.491

To determine:

The chemical formula

Calculation:

The mass ratio is Fe:O = 3.491 : 1

Mass of Fe = 3.491 g

Mass of O = 1.000 g

Atomic mass of Fe =55.85 g/mol

Atomic mass of O = 16.00 g/mol

Therefore, the molar ratio of Fe:O = 1:1

Hence, chemical formula is FeO

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 maximum mass of nh3 is nh3 in grams