In the equation c2h4 + 3o2 = ? co2 + 2h2o, how many co2 molecules are needed to balance the equation?

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Question:

In the equation c2h4 + 3o2 = ? co2 + 2h2o, how many co2 molecules are needed to balance the equation?

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C2H4 +3O2 =?CO2 +2H2OThe number  of CO2  molecule s that are needed to balance the  equation aretwo (2)that is  C2H4 +3O2 = 2CO2+ 2H2O1 molecule of   ethane (C2H4)  is burned in presence of oxygen to form 2 molecules of carbon(iv) oxide (CO20 and 2 molecules of water(H2O)

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