Question

How many moles of oxygen are needed to react with 7.5 moles of aluminum?

Answer 1

equation for oxygen gas molecules
1.5O₂ + 2Al => Al₂O₃
ratio of aluminium to oxygen is
2:1.5
when Al is 7.5
O₂ is 3.75

Answer 2

5.63 moles of oxygen are needed to react with 7.5 moles of aluminum in the following reaction: 4Al + 3O2 → 2Al2O3.

How to calculate number of moles?

The number of moles of a compound in a chemical reaction can be calculated as follows:

The chemical equation between aluminum and oxygen is as follows:

4Al + 3O2 → 2Al2O3

Based on the above equation, 4 moles of aluminum reacts with 3 moles of oxygen

7.5 moles of aluminum will react with (7.5 × 3/4) = 5.63 moles of oxygen.

Therefore, 5.63 moles of oxygen are needed to react with 7.5 moles of aluminum in the following reaction: 4Al + 3O2 → 2Al2O3.

Learn more about stoichiometry at: https://brainly.com/question/17434463

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