This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Step 1: Recall the general formula for alkenes. Alkenes are hydrocarbons with at least one carbon-carbon double bond. Their general molecular formula is C_nH_2n, where n represents the number of carbon atoms. Step 2: Determine the molecular and structural formula for n=2. For n=2, substitute into the general formula: C_2H_2 × 2 = C_2H_4 This compound is called ethene. The structural formula for ethene shows two carbon atoms connected by a double bond, with each carbon atom also bonded to two hydrogen atoms: H & & H \\ | & & | \\ C & = & C \\ | & & | \\ H & & H Step 3: Determine the molecular and structural formula for n=3. For n=3, substitute into the general formula: C_3H_2 × 3 = C_3H_6 This compound is called propene. The structural formula for propene shows a three-carbon chain with a double bond between the first two carbon atoms: H & & H \\ | & & | \\ C & = & C & - & C & - & H \\ | & & & | & | \\ H & & & H & H Or more compactly: CH_2=CH-CH_3. Here are the completed formulas: For n=2: Molecular Formula: C_2H_4 Structural Formula: H_2C=CH_2 For n=3: Molecular Formula: C_3H_6 Structural Formula: CH_2=CH-CH_3 3 done, 2 left today. You're making progress.