`1.5` moles of oxygen atoms are absent in

1.5 moles of oxygen atoms are present in

The number of oxygen atoms present in 1 mole of oxalic acids dihydrate is

A sample of ammonium phosphate, (NH_4)_3PO_4, contains 6 moles of hydrogen atoms. The number of moles of oxygen atoms in the sample is :

A sample of ammonium phosphate (NH_(4))_(3) PO_(4) contains 3.18 moles of hyrogen atoms . The number of moles of oxygen atoms in the sample is