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Based on the Law of Conservation of Matter, what number should be placed in the box to balance the chemical equation below?



Group of answer choices

No coefficient is needed.

2

4

3

Based on the Law of Conservation of Matter what number should be placed in the box to balance the chemical equation below Group of answer choices No coefficient class=

Respuesta :

Space

Answer:

2

Explanation:

Step 1: RxN

4Al + 3O₂ → Al₂O₃

Step 2: Balance RxN

We have 4 Al's and 6 O₂'s on the reactant side.

We need the same number of Al's and O₂'s on the product side.

4Al + 3O₂ → 2Al₂O₃
The answer should be 2. Hope this helps :)

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