Well, aluminum is an element, so none. However, aluminum does oxidize, and some quantity of oxygen might be derived if you will provide the surface area of the aluminum being oxidized, and the conditions, which would estimate a rate of oxidation without actually giving you any meaningful number. Aluminum oxide--the oxidate on the surface of oxidized aluminum--is Al2O3, or 2 parts Al to 3 parts O.
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1 formula unit of aluminum sulfate has the formula Al2(SO4)3. So there are 2 atoms of aluminum, 3 atoms of sulfur and 12 atoms of oxygen in 1 formula unit of aluminum sulfate. There are no molecules of aluminum sulfate. They are called formula units.
The formula unit of aluminum nitrate is Al(NO3)3. This shows that the formula unit contains 1 aluminum atom, 3 nitrogen atoms, and 9 oxygen atoms for a total of 13 atoms.
The formula unit for aluminum nitrate has the formula Al(NO3)3. Subscripts within parentheses are multiplied by the subscript after the parentheses. Therefore, this formula unit contains nine oxygen atoms, three nitrogen atoms, and one aluminum atom for a total of 13 atoms.
Aluminum dichromate has the formula unit of Al2(Cr2O7)3. This means there are two aluminum, six chromate and 21 oxygen atoms present for a total of 29 atoms.
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1 formula unit of aluminum sulfate has the formula Al2(SO4)3. So there are 2 atoms of aluminum, 3 atoms of sulfur and 12 atoms of oxygen in 1 formula unit of aluminum sulfate. There are no molecules of aluminum sulfate. They are called formula units.
The formula unit of aluminum nitrate is Al(NO3)3. This shows that the formula unit contains 1 aluminum atom, 3 nitrogen atoms, and 9 oxygen atoms for a total of 13 atoms.
The formula unit for aluminum nitrate has the formula Al(NO3)3. Subscripts within parentheses are multiplied by the subscript after the parentheses. Therefore, this formula unit contains nine oxygen atoms, three nitrogen atoms, and one aluminum atom for a total of 13 atoms.
Aluminum dichromate has the formula unit of Al2(Cr2O7)3. This means there are two aluminum, six chromate and 21 oxygen atoms present for a total of 29 atoms.
4 oxygen atoms are present
The 2 in front means 2 formula units, or 2 moles of the compound Al3O2. So you would multiply the 2 in front times the subscripts in the formula unit Al3O2. In the formula unit Al3O2, there are 5 atoms. Multiply that by the 2 in front and you get 10 atoms.
Ba(OH)2 There are two oxygen atoms in the compound unit of barium hydroxide.
The compound sodium acetate is C2H3NaO2, so each formula unit has 2 oxygen atoms.
Al2(SO4)3 So: 2x Aluminium 3x Sulphur 12x Oxygen
Al(NO3)3 has 9 atoms of oxygen.
The formula unit of calcium carbonate is CaCO3. Therefore, it has 3 oxygen atoms.