MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryMole _ Equivalent ConceptAtomic and Molecular Masses
How many moles of magnesium phosphate, Mg₃ (PO₄)₂ will contain 0.25 mole of oxygen atoms ?
A.0.02
B.3.125×10–2✓ Correct
C.1.25×10–2
D.2.5×10–2
Explanation
1 mole of 3 4 2 ( ) Mg PO contains 8 moles of oxygen. Therefore, 0.25 moles contains = 2 0.25 / 8 3.125 10 moles. x
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