Question

question 6
balance the following the chemical equation:
__ al + o2 → __ al2o3
blank 1:
blank 2:
blank 3:

Explanation:

Step1: Balance Al atoms

On the right side, in $\ce{Al2O3}$, there are 2 Al atoms. So we put a coefficient of 4 in front of $\ce{Al}$ to balance Al: $4\ce{Al} + \ce{O2}
ightarrow 2\ce{Al2O3}$

Step2: Balance O atoms

On the right side, in $2\ce{Al2O3}$, there are $2\times3 = 6$ O atoms. On the left side, $\ce{O2}$ has 2 O atoms. So we put a coefficient of 3 in front of $\ce{O2}$ to balance O: $4\ce{Al} + 3\ce{O2}
ightarrow 2\ce{Al2O3}$

Step3: Verify the balance

• Al: Left = 4, Right = $2\times2 = 4$ (balanced)
• O: Left = $3\times2 = 6$, Right = $2\times3 = 6$ (balanced)

Answer:

Blank 1: 4
Blank 2: 3
Blank 3: 2