Question

(a) Give the molecular formula of one homologue of each of the following
(i) C3H6
(ii) C2H6
(iii) C2H2
(b) What is the difference in the molecular mass of any two adjacent homologues?
(c) By how many carbon atoms and hydrogen atoms do any two adjacent homologues differ?

Answer 1

Answer:

(a) (i) C3H6+CH2=C4H8 and so on....

(ii) C2H6=C3H8

(iii) C2H2=C3H4

(b) Don't know at the moment need to find out... sorry!

(c) one carbon and two hydrogen

Explanation:

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Answer 2

The Difference in Molecular mass is 14u

Explanation:

• A.) The molecular formula of one homolog of -

i) $C_3H_6$ (Propene) is $C_4H_8$ (Butene)

ii) $C_2H_6$ (Ethane) is $C_3H_8$ (Propane)

iii) $C_2H_2$ (Ethyne) is $C_3H_4$ (Propyne)

• B.) 14u has been the difference between any two analogous homologous compound's molecular mass.

• C.) There is a difference between one Methyl group ($-CH_2$), or we can say the difference between two homologous compounds is 1 carbon (C) and 2 Hydrogen(H) atoms.