Solid Aluminum and Gaseous Oxygen React in a Combination Reaction

question 82

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)29

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Definitions:

Hydrogen Bonding

A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.

Adenine

A purine nucleobase fundamental to DNA and RNA, vital for energy transfer in cells and protein synthesis.

Thymine

A pyrimidine nucleobase that pairs with adenine in DNA, characterized by its single ring structure.

Hydrogen Bonding

A type of weak chemical bond that occurs when hydrogen, which is bonded to a more electronegative atom, is attracted to another electronegative atom.