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3. Butyric acid is a compound that is present in butter. It has a molar mass of 88.11 g/mol and is composed of 54.5% C, 9.2%
. Calculate the percentage of (a) mercury in HgCo, (b) oxygen in Ca(CIO:), (c) nitrogen in CH,,N, (nicotine) (d) Mg in C.H.Mg
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Ans 8)The solution start with the converting % to mass of the elements then converting it to moles of the elements .Then this moles divided with lowest value of the moles calculated .Then molecular formula is calculated by taking the ratio of molar mass Given and mass of empirical formula.

Ans Mass of carbon = 54.5g Mass of Hydrogen= 9.2g Mass of oxygen = 363g = 4.541 mole Moles of carbon = 54.5 g 12 gimol Moles

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