Question

PLEASE HELP ME WITH NUMBER 3!!!! you just have to fill in the blanks to get the balanced equation!!

Answer 1

4Al + 3O₂ → 2Al₂O₃

Step-by-step explanation:

The problem here is in balancing the equation below:

Al + O₂ → Al₂O₃

In balancing a chemical equation, the number of atoms on both sides of the expression must be the same;

put the alphabets a, b and c before each specie;

aAl + bO₂ → cAl₂O₃

Conserving Al;

a = 2c

Conserving O:

2b = 3c

Now, let c = 1, a = 2

b =
`(3)/(2)`

Multiply through by 2;

c = 2, a = 4 and b = 3

4Al + 3O₂ → 2Al₂O₃