Umm..okay..I'm not sure I really get it..
I know that unsaturated compounds contain carbon-carbon double bonds, but none of these contain double bonds...
and you said that the formula for saturated compounds is CnH 2n+1, but aren't alkanes saturated compounds, and that's not their formula..right?
and alkenes are unsaturated and their formula is CnH 2n,
? i hope I haven't confused you and myself even more