calculate the emperical formula of a compound "A" which is obtained from the catalytic hydrogenation of acetiline if this compound contains 92.7% carbon and 7.3% hydrogen???
 

The given equation is catalytic hydrogenation of acetylene. So either the product is ethylene or ethane.
Element % At mass % / at mass Simple ratio Whole number ratio
C 92.7 12 92.7/12 = 7.725   7.725 / 7.3 =1.06  1
H 7.3 1 7.3/1 = 7.3 7.3 / 7.3 =1 1


Thus the empirical formula of the compound is CH

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