Mole ConceptHard

Question

A compound contains equal masses of the elements A, B and C. If the atomic masses of A, B and C are 20, 40 and 60, respectively, then the empirical formula of the compound is

Options

A.A3B2C
B.AB2C3
C.ABC
D.A6B3C2

Solution

$N_{A}:N_{B}:N_{C} = \frac{w}{20}:\frac{w}{40}:\frac{w}{60} = 6:3:2$

⇒ Empirical formula = A6B3C2

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