There are 3:
Pentane, methylbutane and dimethylpropane
pentane forms 3 isomers.
4
The three isomers of pentane have different structures,i.e.they r chain isomers.
There are 3 isomers of C5H12[pentane] They are 1st- N pentane, 2nd- Isopentane/Dimethylbutane, and 3rd Neopentane/Dimethylpropane
Pentane 2 methylbutane dimethylpropane
Since the isomers of pentane have different boiling points, they can be separated by techniques such as fractional distillation.
Pentane C5H12 = CH3(CH2)3CH3 has 3 isomers:n-pentane,2-methyl butane,2,3-dimethyl propane
Pentane, isopentane and neopentane.
Pentane
Methane, ethane and propane don't have isomers (confirmers are possible) , butanes are two n-butane and iso-butane, pentanes are three n-pentane, iso-pentane and neo-pentane.
pentane 2-methyl butane 2,2-dimethyl propane
All pentane isomers have always 5 carbon atoms. Besides that, there are 12 hydrogens: C5H12, except cyclopentane (C5H10).