Question

1

Aluminum metal and oxygen gas combine to produce aluminum oxide.
Which of these is the balanced equation for this reaction? *

Answer 1

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Step-by-step explanation:

Let's consider the unbalanced molecular equation when aluminum metal and oxygen gas combine to produce aluminum oxide. This is a combination reaction.

Al(s) + O₂(g) ⇒ Al₂O₃(s)

We can balance O atoms by multiplying O₂ by 3 and Al₂O₃ by 2.

Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)

Finally, we multiply Al by 4 to get the balanced equation.

4 Al(s) + 3 O₂(g) ⇒ 2 Al₂O₃(s)