B) ¿Cuántos gramos de oxígeno (O2) reaccionan con 3.97 moles de
AI?

Mass of Oxygen = 95.36 g

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

How many grams of oxygen (O2) react with 3.97 moles of  AI?

Reaction

4 Al + 3 O₂ → 2 Al₂O₃

From the equation , mol ratio Al :  O₂ = 4 : 3, so mol  O₂ :

mass  O₂(MW=32 g/mol) :

Sorry i think the answer is b

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