Alkine for

ula

The formula for an alkene, also known as an olefin, is typically written as CnH2n, where "n" represents the number of carbon atoms in the molecule. Alkenes are hydrocarbons that contain at least one carbon-carbon double bond.

To determine the molecular formula of a specific alkene, you need to know the total number of carbon atoms in the molecule. Once you know the number of carbon atoms, you can substitute that value into the formula to find the corresponding number of hydrogen atoms.

For example, if you have an alkene with 3 carbon atoms, the formula would be:

CnH2n => C3H2(3) => C3H6

So, in this case, the molecular formula of the alkene with 3 carbon atoms is C3H6.