21. Butyric acid contain C, H, O. A sample 4.24mg of butyric acid is completely burned. It give 8.45mg
CO2and 3.46mg of H2O. The molecular formula of butyric acid is 88amu. What is molecular formula?
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answer is , empirical formula is C2H4O
the valu of n=88/44=2 , so molecular formula is C4H8O2
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