A hydrocarbon A, contains 87.8%carbon and 12.2%hydrogen by mass. It's relative molecular mass is 82. It decolorizes bromine water and in the presence of nickel to for B. 0.1g of A was found to absorb 27.3cm3 of hydrogen (at STP). B does not decolorize bromine water.
What is the empirical formula of A
empirical formula of A="CH_2"
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