A student observes a chemical reaction.

Aluminum (Al) + Oxygen (O) yields Aluminum Oxide (Al2O3)

She writes an equation that correctly displays the law of conservation of mass.

Select the balanced equation below that she wrote about this chemical reaction.

Group of answer choices

4Al + 3O2 --> 2Al2O3

4Al + 2O2 --> 3Al2O3

2Al + 3O3 --> 2Al2O3

Al + O2 --> Al2O3