Give the general formula for any cyclic alkene; that is, a cyclic hydrocarbon with one double bond. (Type your answer using the format CnHn+1 for CnHn+1.)
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A cyclic alkane is CnH2n
A cyclic alkene is CnH2n-2
To find the general formula for any cyclic alkene, we need to understand the rules for naming and calculating the molecular formula of organic compounds.
1. Determine the number of carbon atoms: Let's assume the number of carbon atoms in the cyclic alkene is 'n'.
2. Calculate the number of hydrogen atoms: Since it is an alkene, each carbon atom in the double bond needs to have one hydrogen atom attached. So, for 'n' carbon atoms, we'll have '2n' hydrogen atoms in total.
3. Add an extra hydrogen atom: In a cyclic alkene, we subtract two hydrogen atoms due to the presence of the double bond. So, we add one additional hydrogen atom to the total calculated in step 2.
Combining steps 2 and 3, the general formula for any cyclic alkene can be expressed as: CnH2n+2.
Therefore, the general formula for a cyclic alkene is CnH2n+2, where 'n' represents the number of carbon atoms in the cyclic ring.