A student was trying to determine the identity of an unknown compound. The melting point of the compound was 117-118 oC. The student narrowed the possible compounds down to the following: acetanilide 113-115 oC fluorene 114-116 oC mandelic acid 120-122 oC Explain in detail how the student can determine the identity of their unknown. b) A second student doing the same experiment as above, found that their melting point was 100-108 oC. What is wrong with the student’s melting point? Propose a reason why the melting point is incorrect.

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.

law of conservation of matter

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it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2