A disclaimer: This problem does not assume any knowledge of chemistry:


The formulae for chemical molecules and their names are given below in mixed order:
C₃H₈, C₄H₆, C₃H₄, C₄H₈, C₇H₁₄, C₂H₂;
Heptene, Butyne, Propane, Butene, Ethyne, Propyne.

1.Match the formulae with the names.
Explain your solution.

2.Write the names corresponding to the following formulae: C₂H₄, C₂H₆, C₇H₁₂.

3.Write the formulae for the following molecules: Propene, Butane.

Source: Russian contest

Where n_C is number of atoms of Carbon and  n_H is the number of atoms of Hydrogen

'Eth-' : n_C = 2
'Prop-': n_C = 3
'But-' : n_C = 4
'Hept-': n_C = 7

'-yne' : n_H = 2*(n_C - 1)
'-ene' : n_H = 2*(n_C)
'-ane' : n_H = 2*(n_C + 1)


1.
C₂H₂ = Ethene
C₃H₄ = Propyne
C₃H₈ = Propane
C₄H₆ = Butyne
C₄H₈ = Butene
C₇H₁₄ = Heptene

2.
C₂H₄ = Ethene
C₂H₆ = Ethane
C₇H₁₂ = Heptyne

3.
Propene = C₃H₆
Butane = C₄H₁₀

Posted by Dej Mar on 2012-08-17 00:04:09