How many Hydrogen atoms are in an Alkane with 7 Carbon atoms?

Answer 1

Alkanes have the general formula of CnH2n+2 so for 12 carbons, that would be 2x12 + 2 = 26 hydrogen atoms.

Answer 2

Well, each carbon atom can have up to four bonds.

An alkane is a straight line of carbons attached to each other with single bonds. So an alkane with nine carbon atoms looks something like this:

C-C-C-C-C-C-C-C-C

If each carbon atom can have four bonds, then the two carbons on the end (who are bonded only to one other carbon) have room for three hydrogens to bond.

The seven carbons in the middle of the chain only have room for two hydrogens.

So 2 carbons times 3 hydrogens = 6 hydrogens, and 7 carbons times 2 hyrdrogens = 14 hydrogens, for a total of 20 hydrogen atoms.

Added: (the answer above is correct but laborous and sensitive for making mistakes)

In Alkane with n C-atoms there are 2n+2 H-atoms, so if n=9 then number H's is (2*9)+(2) = 20

Answer 3

For alkanes use the general formula. C(n) H(2n + 2)

Where 'n' is the number of carbons.

He3nce for 8 carbons we have

C8H(2(8)+2)

C8H(16 + 2)

C8H18 The answer.

For alkenes the general formula is C(n) H(2n) e.g. C8H16 (Octene)

For alkynes the general formula is C(n) H(2n - 2) e.g. C8H14 (Octyne)

Answer 4

General formula of alkanes (except cyclic alkanes) is CnH2n+2 for n = integer 1, 2, 3, etc. So for n=9 (nonane) it is C9H20 with ( 2*9 + 2 = ) 20 H atoms.

Answer 5

An linear alkane with eight carbons will have thirteen hydrogen atoms bonded to the carbon atoms.

Answer 6

Alkanes have the general formula of C(n)H(2n+2). So, for 9 carbons, the number of hydrogens would be 9x2 + 2 = 20. So you would have C9H20 (nonane).

Answer 7

Alkanes have the general formula of CnH2n+2 so for 12 carbons, that would be 2x12 + 2 = 26 hydrogen atoms.

Answer 8

Dodecane has 26 hydrogen atoms.