A gaseous hydrocarbon, 20.0 mL, is mixed with 100.0 mL of oxygen, which is more than enough, and sparked. After the products are cooled to the starting temperature and pressure, when the steam has become liquid, the gas volume is 80.0 mL. Shaking with potassium hydroxide solution reduces it to 20.0 mL. What is the molecular formula of the hydrocarbon?

ChemistryHardHigh School (11–12)Chemical Reactions › Chemical Equations Olympiad

A gaseous hydrocarbon, $20.0\ \text{mL}$ , is mixed with $100.0\ \text{mL}$ of oxygen, which is more than enough, and sparked. After the products are cooled to the starting temperature and pressure, when the steam has become liquid, the gas volume is $80.0\ \text{mL}$ . Shaking with potassium hydroxide solution reduces it to $20.0\ \text{mL}$ . What is the molecular formula of the hydrocarbon?

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