Question

What is the molecular formula for an 18 carbon alkane

Answer 1

C(n)H(2n+2)
n:18
Sub the the value of n
C18H38

Answer 2

Answer: C18 H38

Explanation: Alkane follows the general formula of CnH2n+2.

Here n = 18 , substituting the value of n in the above formula, we get

C 18 H 2(18)+2 = C18 H38

The name of this alkane is Octadecane and it can also be written like this -

Ch3 (ch2)16 Ch3

Octadecane is the straight chain alkane having 18 carbon atoms .