Mole ConceptHard

Question

X and Y are two elements which form X2 Y3 and X3Y4. If 0.20 mol of X2Y3 weighs 32.0 g and 0.4 mol of X3Y4 weighs 92.8 g, the atomic weights of X and Y are respectively

Options

A.16.0 and 56.0
B.8.0 and 28.0
C.56.0 and 16.0
D.28.0 and 8.0

Solution

= 0.2
= 0.4    
Hence: x = 56 & y = 16

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