Question

Consider the unbalanced equation for the oxidation of aluminum.

_Al + _O2 mc031-1.jpg _Al2O3

Which sequence of coefficients should be placed in the blanks to balance this equation?
2, 3, 1
1, 3, 2
4, 3, 2
3, 2, 3

Answer 1

c

Step-by-step explanation:

edg 2020

Answer 2

In order to balance an equation, we apply the principle of conservation of mass, which states that mass can neither be created nor destroyed. Therefore, the mass of an element before and after a reaction remains constant. Here, the balanced equation becomes:
4Al + 3O₂ → 2Al₂O₃

The coefficients are 4, 3 and 2.