Question

Please help quickly!!!
4 Al + 3O2 → 2Al2O3
What does the "3" in front of O2 stand for?
A) It indicates that there are 5 oxygen atoms after you add the coefficient and the subscript.
B) It indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule.
C) It indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction.
D) It indicates that there are 3 separate oxygen molecules in the reaction.

Answer 1

Answer:- It indicates that there are 3 separate oxygen molecules in the reaction.

Explanations:- $O_2$ is oxygen molecule in which two O atoms are bonded together with a double bond(O=O). The numbers written in front of the chemical formulas in an equation are the coefficients and they are used to balance the equations.

The balanced equation has 3 molecules of $O_2$ and all these molecules are separate from each other as the bonds are between two oxygen atoms of a molecule but not between the oxygens of two molecules.

Of course there are 6 oxygen atoms in total but they all are not bonded together as a single molecule.

So, the right choice is D) It indicates that there are 3 separate oxygen molecules in the reaction.

Answer 2

the right choice is D) It indicates that there are 3 separate oxygen molecules in the reaction.

HOPE I HELPED :)