Question

Write the chemucal formula and number of -CH2- unit of propene

Answer 1

Chemical formula of propene-

CH3–CH–CH2

Number of CH2 units is 1

Answer 2

The chemical formula of propene is $C_{3}H_{6}$ and number of -$CH_{2}$ unit of propene is one.

Explanation:

• Alkenes are the species which contain at least one double bond in their chemical formula or molecular structure. General, chemical formula of an alkene is $C_{n}H_{2n}$.

• As there are three carbon atoms present in a propene molecule. Therefore, its chemical formula will be as follows.

                  $C_{n}H_{2n}$

                = $C_{3}H_{2(3)}$

                = $C_{3}H_{6}$

• Hence, the chemical formula is $CH_{3}-CH \equiv CH_{2}$. Hence, there is only one $CH_{2}$ unit is present.

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