Question

How many moles of mg(po4)2 will contain 0.25 moles of oxygen atoms?

Answer 1

1 mole of Mg(PO4)2 contains 8 moles of Oxygen atoms

8 moles of oxygen atoms = 1 mole of Mg(PO4)2

1 mole of oxygen atoms = 1 /8 mole of Mg(PO4)2

0.25 moles of oxygen atoms = (1/8)*0.25 mole of Mg(PO4)2

1/32 moles of Mg(PO4)2 or 0.03125