Question

4 Al + 3 O2 --> 2 Al2O3

How many moles of aluminum are needed to produce 3.7 mole of aluminum oxide?
Answer:

Answer 1

The answer to your question is 7.4 moles of Aluminum

Step-by-step explanation:

Data

moles of Al = ?

moles of Al₂O₃ = 3.7

Balanced chemical reaction

4 Al + 3 O₂ ⇒ 2 Al₂O₃

To solve this problem use proportions and cross multiplication. Use the coefficients of the balanced chemical equation.

4 moles of Aluminum ----------------- 2 moles of Al₂O₃

x ----------------- 3.7 moles of Al₂O₃

x = (3.7 x 4) / 2

x = 14.8 / 2

x = 7.4 moles of Aluminum