A sample of ammonium phosphate (NH4)3PO4 contains 3.18 moles of hydrogen atoms then the on. of moles of oxygen atoms in the sample is

3.18 mol H x (4 mols O/12 mol H) = ?

To determine the number of moles of oxygen atoms in the sample, we first need to find the ratio of oxygen atoms to hydrogen atoms in ammonium phosphate ((NH4)3PO4).

The chemical formula for ammonium phosphate is:
(NH4)3PO4

In this formula, we have 4 hydrogen atoms (H) and 1 oxygen atom (O). Therefore, the ratio of oxygen atoms to hydrogen atoms is 1:4.

Since we know that the sample contains 3.18 moles of hydrogen atoms, we can use this information to determine the number of moles of oxygen atoms.

Number of moles of oxygen atoms = (Ratio of oxygen atoms to hydrogen atoms) x (Number of moles of hydrogen atoms)

Number of moles of oxygen atoms = (1/4) x (3.18 moles)

Calculating this expression gives us:
Number of moles of oxygen atoms = 0.795 moles

Therefore, the sample contains approximately 0.795 moles of oxygen atoms.

To determine the number of moles of oxygen atoms in the sample of ammonium phosphate ((NH4)3PO4), we need to analyze the chemical formula of the compound and use the coefficients of the chemical formula.

The chemical formula of ammonium phosphate is (NH4)3PO4. This indicates that there are three ammonium ions (NH4+) and one phosphate ion (PO4^3-) in the compound.

To find the number of moles of oxygen atoms, we need to calculate the number of moles of the phosphate ion (PO4^3-), since each phosphate ion contains four oxygen atoms.

From the chemical formula, we can see that each ammonium phosphate molecule contains one phosphate ion. Therefore, the number of moles of phosphate ion is equal to the number of moles of ammonium phosphate.

Given that the sample contains 3.18 moles of hydrogen atoms, we can assume that the sample contains 3.18 moles of ammonium phosphate, as each ammonium ion contains four hydrogen atoms.

To find the number of moles of oxygen atoms, we multiply the number of moles of phosphate ion by the number of oxygen atoms in each phosphate ion (four).

Number of moles of phosphate ion = Number of moles of ammonium phosphate = 3.18 moles

Number of moles of oxygen atoms = Number of moles of phosphate ion × Number of oxygen atoms per phosphate ion = 3.18 moles × 4 = 12.72 moles

Therefore, the number of moles of oxygen atoms in the sample of ammonium phosphate is 12.72 moles.