Question

A sample of ammonium phosphate, (NH4)3PO4, contains 0.104 mol of nitrogen atoms. The number of moles of oxygen atoms in the sample is

Answer 1

Answer:

There are 0.1387 moles of oxygen atoms.

Explanation:

First we calculate how many moles of ammonium phosphate there are:

• There are 3 nitrogen moles per (NH₄)₃PO₄ mole.

• There are 0.104 nitrogen moles

• Thus there are (0.104 mol N * $\frac{1mol(NH_4)_3PO_4}{3molN}$) 0.0347 moles of (NH₄)₃PO₄.

Finally we calculate how many moles of oxygen atoms are there in 0.312 moles of (NH₄)₃PO₄:

• There are 4 oxygen moles per (NH₄)₃PO₄ mole.

• There are 0.0347 moles of (NH₄)₃PO₄.

Thus there are (0.0347 mol (NH₄)₃PO₄ * $\frac{4molO}{1mol(NH_4)_3PO_4}$ ) 0.1387 moles of O.