If you mean this Al2(CO3)3, then 9 oxygen atoms are represented.
15 atoms.
There are 2 oxygen atoms in 1 molecule of oxygen.
There are four oxygen atoms in one molecule of H3PO4.
It has 4 oxygen atoms.
There are 44 atoms of oxygen in 4C12H22O11. Each molecule of C12H22O11 contains 11 oxygen atoms. Multiplying this by 4 gives a total of 44 oxygen atoms.
15 atoms.
The numbers at the beginning of a chemical equation indicate the stoichiometry or the relative amounts of each reactant and product in the reaction. In the example you provided, "3Al2O3" means that three molecules of aluminum oxide (Al2O3) are involved in the reaction.
There are two atoms of oxygen in an oxygen (O2) molecule.
There are 2 oxygen atoms in 1 molecule of oxygen.
It depends on how many hydrogens are there and how many oxygen atoms there are.
There are four oxygen atoms in one molecule of H3PO4.
There are 2 oxygen atoms in dioxide
There are 3 atoms in an oxygen molecule (O2).
There are 2 atoms and 3 molecules in oxygen.
Heptane has 22 oxygen atoms.
3
The oxide Fe2O3 has 3 oxygen atoms in the molecule.