1.

A compound of X and Y has the empirical formula XY2. Its vapour density is equal to its empirical formula weight. Determine its molecular formula.

Answer»

E.F. = XY2 

E.F.W. = V.D. 

M.W. = 2 × V.D. 

M.W. = 2 × [E.F.W.] 

So molecular formula = (XY2)2 = X2Y4



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