5.862 moles of O₂
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Further explanation</h3>
Given:
Combustion of 54.7 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:
- Relative atomic mass: C = 12 and H = 1.
- Relative molecular mass (Mr) of C₂H₄ = 2(12) + 4(1) = 28.
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 5.862 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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