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Concentration Terms - An Introduction (w/w etc)

a compound co...

Question

a compound containing c h and o was found to contain 40% c and molecular formula mass was equal to 60 AMU the ratio of number of atoms H to O atom is 2:1what is the empirical formula of the compound

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Solution

Dear student

let x be the no. of oxygen and 2x be the no. of hydrogen,
40% of the compound is carbon, hence its mass will be
40% of 60 = 24

Hence
16x+ 1(2x) + 24 = 60
x=2
Hence the formula of compund is CH₃COOH and it's empirical formula is CH₂O

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