Solid Aluminum and Gaseous Oxygen React in a Combination Reaction

question 157

Multiple Choice

Solid aluminum and gaseous oxygen react in a combination reaction to produce aluminum oxide: 4Al (s) + 3O₂ (g) → 2Al₂O₃ (s)
In a particular experiment, the reaction of 2.5 g of Al with 2.5 g of O₂ produced 3.5 g of Al₂O₃. The % yield of the reaction is ________.

• A)74
• B)37
• C)47
• D)66
• E)26

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