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Stoichiometry and Stoichiometric Calculations

At 300 K, 40 ml of Ethylene is subjected to combustion with 160 ml of Oxygen in a closed vessel. The reaction is highly exothermic. On  cooling to 300 K, the volume of gases left in the vessel would be


C2H4g 40ml+3O2g 120ml160ml40ml  excess2CO2g80ml+2H2Ol

Total volume of gases left = (40 + 80) ml = 120 ml

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