Question

1. one hexane
2. two methane
3. three octane
4. four ethane
5. five decane

Answer 1

General formula of alkanes is C(n)H(2n+2).

1. Hexane (n=6) - C6H14      
2.Methane (n=1) - CH4
3. Octane(n=8) -C8H18
4. Ethane (n=2) - C2H(2*2+2),   C2H6
5. Decane(n=10) -C10H22