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Two elements X (Atomic mass 75) and Y (Atomic mass 12) combine to give a compound having 75.8% X. The empirical formula of the compound is _______. 

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Two elements X (Atomic mass 75) and Y (Atomic mass 12) combine to give a compound having 75.8% X. The empirical formula of the compound is _______. 

(A) XY 

(B) XY2 

(C) X2Y2 

(D) X2Y3

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1 Answer

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Correct option: (B) XY2 

% of X = 75.8

∴ % of Y = 100 – 75.8 = 24.2

Thus, empirical formula of the compound is XY2.

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