Question

A sample of ammonium phosphate, `(NH_(4))_(3)PO_(4)` contains `3.18` mol of hydrogen atoms. The number of moles of oxgen atoms in the sample is .
A. `0.265`
B. `0.795`
C. `1.06`
D. `3.18`

Answer 1

Correct Answer - C
In one mole of `(NH_(4))_(3)PO_(4)`, 12 moles of hydrogen atoms 4 moles of oxygen atoms, 3 moles of nitrogen atoms and 1 mole of phosphorus atoms are present
If 3.18 mole of hydrogen atom are there, number of moles of oxygen atoms `= (3.18)(3)mL = 1.06 mol`