Question

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

• A. 0.265
• B. 0.795
• C. 1.06
• D. 4.00

Answer 1

The correct option is C

1.06

In $(N{H}_4{)}_{3}P{O}_4$ 12 moles of ‘H’ are present with 4 moles of oxygen atom.
$\therefore$ 3.18 moles of ‘H’ are present with $=\frac{4}{12}\times 3.18=1.06$ moles of oxygen atom.