Question

question 5
balance the following the chemical equation:
__ mg + o2 → __ mgo
blank 1:
blank 2:
blank 3:
question 6
balance the following the chemical equation
__ al + o2 → __ al2o3

Explanation:

Question 5

Step1: Analyze O atoms

On the left, \( O_2 \) has 2 O atoms. On the right, \( MgO \) has 1 O atom. To balance O, put 2 in front of \( MgO \): \( Mg + O_2 \to 2MgO \)

Step2: Analyze Mg atoms

Now, right side has 2 Mg (from \( 2MgO \)). So put 2 in front of \( Mg \): \( 2Mg + O_2 \to 2MgO \)

Step1: Analyze O atoms

Left: \( O_2 \) (2 O). Right: \( Al_2O_3 \) (3 O). Find LCM of 2 and 3, which is 6. So put 3 in front of \( O_2 \) (3×2=6 O) and 2 in front of \( Al_2O_3 \) (2×3=6 O): \( Al + 3O_2 \to 2Al_2O_3 \)

Step2: Analyze Al atoms

Right: \( 2Al_2O_3 \) has 4 Al. So put 4 in front of \( Al \): \( 4Al + 3O_2 \to 2Al_2O_3 \)

Answer:

Blank 1: 2, Blank 2: 1, Blank 3: 2 (The balanced equation is \( \boldsymbol{2Mg + O_2 \to 2MgO} \))

Question 6