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Concentration Terms - An Introduction (w/w etc)

Empirical for...

Question

Empirical formula of a compound is CH3 and its molecular weight is 30. What is molecular formula

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Solution

Dear student,

mass of the compound from its empirical formula = CH₃ = 12+3(1) = 15
Product of mass of compound from empirical formula and a factor (x) equals the molecular weight.
x . CH₃ = 30
15x = 30
x = 30/15 = 2
Thus, 2 CH3
Therefore, molecular formula = C₂H_{6
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Concentration Terms - An Introduction (w/w etc)

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