Answer:
3 elements
Explanation:
[tex]4CO_2+6H_2O[/tex]
the elements that we see are
Carbon (C)
Oxygen (O)
Hidrogen (H)
Oxygen (O)
but it says DIFFERENT so we are counting two oxygens that are the same
so we only have
Carbo (C)
Oxygen (O)
Hidrogen (H)
hence there are only three different elements
