Question

A sample of ammonium phosphate, (NH4)3 PO4, contains 6 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is:

(a) 1

(b) 2

(c) 4

(d) 6



9. Total number of moles oxygen atoms in 3 litre O3 (g) at 270C and 8.21 atm are:

(a) 3

(b) 1

(c) 1

(d) None of these

Answer 1

in the formula of ammonium phosphate there are 12 hydrogen atoms.Now it is given that there are 6 hydrogen molecules in the formula.It means that 2 atoms =1 molecule. So if there are 12 hydrogen atoms in the sample then the no of hydrogen molecules will be 12/2 =6