Question

how to use the general formula CnH2n+2?

Answer 1

CnH2n+2.First,put value of no.of carbon atoms in this formula.let's assume that it is 2.then put this 2 in place of n.The formula now becomes C2H4+2 that is C2H6

Answer 2

General formula $C_nH_{(2n+2)}$

• The given general formula is used to find the members belonging to the alkane family.
• To find members in the order, different value is assigned to 'n'. When the formula is solved with the assigned value it gives the name of the alkane.
• For example, to find the $5^{th}$ member of the alkane family the following calculation must be done:

Assign n = 5, in $C_nH_{(2n+2)$

$C_5H_{(2(5)+2)$ = $C_5H_{(10+2)$ = $C_5H_{12}$

• From the above calculation the $5^{th}$ member of the alkane family is identified as pentane $(C_5H_{12})$

Learn more about such concept

General formula of alkene​

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What are hydrocarbons?write the name and general formula of saturated and unsaturated hydrocarbons,and draw the structure of one hydrocarbon of each type.How can an unsaturated hydrocarbon be made saturated?

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