Write the molecular formula for an alkyne with 4 C atoms.

• A. C₄H₈
• B. C₄H₁₀
• C. C₄H₆
• D. C₄H₄

Answer: (C)

Verified step by step guidance

1. Understand that alkynes are hydrocarbons with at least one carbon-carbon triple bond. The general formula for alkynes is CnH2n-2.
2. Identify the number of carbon atoms in the alkyne. In this case, the problem specifies 4 carbon atoms.
3. Apply the general formula for alkynes: CnH2n-2. Substitute n with 4, which represents the number of carbon atoms.
4. Calculate the number of hydrogen atoms using the formula: H = 2n - 2. For n = 4, calculate 2(4) - 2.
5. Combine the number of carbon and hydrogen atoms to write the molecular formula for the alkyne: C4H6.