Water (H2O) has 3 atoms in each formula unit.
There are a total of 12 oxygen atoms in two calcium carbonate formula units. Each formula unit of calcium carbonate (CaCO3) contains 3 oxygen atoms, so for two formula units, there would be 6 oxygen atoms in each unit, totaling 12 oxygen atoms.
Al2(SO4)3 So: 2x Aluminium 3x Sulphur 12x Oxygen
There are three oxygen atoms present in a formula unit of Aluminum Hydroxide (Al(OH)3).
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.
Al(OH)3 has three hydrogens. So there are six hydrogens in 2Al(OH)3
If you mean the 3 in the formula AgNO3, it refers to the fact that silver nitrate has 3 oxygen atoms in each formula unit.
There are a total of 12 oxygen atoms in two calcium carbonate formula units. Each formula unit of calcium carbonate (CaCO3) contains 3 oxygen atoms, so for two formula units, there would be 6 oxygen atoms in each unit, totaling 12 oxygen atoms.
Each formula unit of Fe2(C2O4)3 contains 15 atoms (2 Fe atoms, 6 C atoms, and 7 O atoms). Therefore, 5 formula units would contain a total of 75 atoms (5 formula units x 15 atoms per formula unit).
The formula unit for calcium nitride is Ca3N2. To find the total number of atoms, you add the number of atoms in each element together: 3 calcium atoms + 2 nitrogen atoms = 5 atoms in total.
Al2(SO4)3 So: 2x Aluminium 3x Sulphur 12x Oxygen
There are three oxygen atoms present in a formula unit of Aluminum Hydroxide (Al(OH)3).
There are 9 atoms of oxygen in one formula unit of aluminum nitrate (Al(NO3)3).
Aluminium trichloride has 4 atoms in the formula unit.
The formula unit for calcium nitride is Ca3N2. That would be 3 atoms of calcium and 2 atoms of nitrogen, for a total of 5 atoms in a formula unit.
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.
Al(OH)3 has three hydrogens. So there are six hydrogens in 2Al(OH)3
One formula unit of iron III chloride contains one iron atom and three chlorine atoms, totaling four atoms.