CBSE Class 11-science Answered
P and Q are two elements which form P2Q3 and PQ2. If 0.15 mole of P2Q3 weighs 15.9 g and 0.15 mole of PQ2 weighs 9.3 g, then what are atomic weights of P and Q
Asked by Anil | 12 May, 2017, 09:30: PM
Expert Answer
Lets assume the atomic masses of P and Q are x and y respectively.
Mw of P2Q3 = 2 x + 3 y
MW of PQ2 = x + 2 y
we know moles = weight/ mw
so, 2x + 3y = 15.9/ 0.15
x + 2y = 9.3/ 0.15
Solving these equations, you will get x= 26, y =18
Answered by Vaibhav Chavan | 13 May, 2017, 05:47: PM
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