The molecular formula C3Ho is incorrect. The correct molecular formula for a three-carbon alkane is C3H8.

Here's why:

* Alkanes are hydrocarbons with only single bonds between carbon atoms.

* The general formula for alkanes is CnH2n+2, where 'n' is the number of carbon atoms.

* For a three-carbon alkane (n=3), the formula would be C3H(2*3+2) = C3H8.

The correct name for this alkane is propane.