[bmack]

Okay, I am lost. Teacher said I should be able to solve...solve what?

[enahs]

Uhhh, could you restate the question with all the information you have...?

[bmack]

Well, this is all I have. My teacher said I should be able to solve any hydrogen problems

 He explined that Menthane=1 Ethane=2 Propane=3 buthane=4 and pentane=5 ( I may have mispelled some words) anyway he said I would have to replace N depending on what it represented...he did not give any example...so I am lost.

[AWK]

Well, this is all I have. My teacher said I should be able to solve any hydrogen problems

 He explined that Menthane=1 Ethane=2 Propane=3 buthane=4 and pentane=5 ( I may have mispelled some words) anyway he said I would have to replace N depending on what it represented...he did not give any example...so I am lost.

This is a general formula for saturated hydrocarbons called alkanes C_nH_2n+2
alkenes C_nH_2n
alkynes C_nH_2n-2
Put non-zero integer for n and you get a formula for any alkane with n carbon atoms
http://en.wikipedia.org/wiki/Alkanes