Question: P and Q are two elements which form P2Q3 and PQ2 molecules. If 0.15 mole of P2Q3 and PQ2 weighs 15.9 g and 9.3g, respectively,

P and Q are two elements which form P2Q3 and PQ2 molecules. If 0.15 mole of P2Q3 and PQ2 weighs 15.9 g and 9.3g, respectively, what are atomic mass of P and Q?

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