Question

A sample of ammonium phosphate ${\left(N{H}_4\right)}_{3}P{O}_4$ contains 3.18 moles of oxygen atoms the number of moles of oxygen atoms in the sample is

Answer 1

Step 1:

From the chemical formula of the compound, we can find that:

The number of H atoms = 12

The number of O atoms = 4

Let the number of moles of oxygen atom in the sample is $n_o$

Step 2:

We can say that,

ratio of no. of atoms = ratio of no. of moles

$\therefore \frac{12}{4}=\frac{6}{n_o}$

$n_o=2$

Hence, the number of moles of oxygen atoms in the sample is 2.