Question

A sample of ammonium phosphate (NH4)3PO4 contains 3.18 mol of H atoms. The number of mol of O atoms in the sample is :

• A. 0.265
• B. 0.795
• C. 1.06
• D. 3.18

Answer 1

Answer: (C)

1.06

Answer 2

(3)

In (NH4)3PO4

$\frac{moleofHatom}{moleofOatome} = \frac{12}{4}$

mole of ‘O’ atom = $\frac{4}{12}$ (mole of H atom) = $\frac{1}{3}$ (3.18) = 1.06.