How many moles of o2 are required for the complete reaction of 88.9 g of c2h4 to form co2 and h2o?

9.525 moles of O₂

Given:

Combustion of 88.9 g of C₂H₄ to form CO₂ and H₂O.

Question:

How many moles of O₂ are required for the complete reaction of combustion of C₂H₄?

The Process:

Let us convert mass to mole for C₂H₄.

The combustion reaction of  C₂H₄ (ethylene, also named ethene) can be expressed as follows:

(the reaction is balanced)

According to chemical equation above, proportion between C₂H₄ and O₂ is 1 to 3. Therefore, we can count the number of moles of O₂.

Thus, the number of moles of O are required for the complete reaction of the combustion of C₂H₄ is 9.525 moles.

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Notes:

If we want to calculate the mass of O₂, then we use the number of moles of O₂ that have been obtained.

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14 days is the half-life of phosphorus-32