When Acetylene, C₂H₂, a Fuel Used in Welding, Is Burned

question 26

Multiple Choice

When acetylene, C₂H₂, a fuel used in welding, is burned in air, two molecules of acetylene combine with five oxygen molecules to form four CO₂ molecules and two H₂O molecules. Select the statement below that is incorrect in regard to this reaction.

• A)The balanced equation for the reaction is 2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O.
• B)If 8 acetylene molecules react, 12 CO₂ molecules should form.
• C)If 12 H₂O molecules are formed, then 30 O₂ molecules must have reacted.
• D)If 12 CO₂ molecules are formed, then 6 H₂O molecules should also form.
• E)If 24 ethanol molecules react, then 60 oxygen molecules must also react

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