Chemistry, asked by kriz9137, 11 months ago

How could we find molecular formula of alkane from its molecular weight??

Answers

Answered by jasmine02
1

Explanation:

Alkanes: Molecular and Structural Formulas. The alkanes comprise a series of compounds that are composed of carbon and hydrogen atoms with single covalent bonds. This group of compounds comprises a homologous series with a general molecular formula of C nH 2 n+2 , where equals any integer.

Alkanes General molecular formula is C(n)H(2n+2) where n is no. of carbon atoms now using it to calculate mass that it

12 is mass of carbon and 1 is of hygrogen.

total given mass is 142. now then

12n +1(2n+2) = 142.

14n +2 = 142

14n = 140

n= 10.

thus Decane is the answer.

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