How many atoms are in the following formula?
3Al2O3

Percent composition by element

Element   Symbol  # of Atoms

AluminiumAl            2

Oxygen         O            3

so 2+3= 5 atoms

hope it helps : )

Explanation:

15 atoms total

Explanation:

2 Al atoms + 3 O atoms = 5 Al2O3 atoms

5 Al2O3 atoms * 3 = 15

another way to do it is:

2 Al atoms * 3 = 6 Al atoms

3 O atoms * 3 = 9 O atoms

6+9 =15 atoms total

idk

explanation:

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