Percentage composition, empirical and molecular formulae

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• A compound X contains 32% of A, 20% of B and remaining percentage of C. Then, the empirical formula of X is :(Given atomic masses of A = 64; B = 40; C = 32 u) Answer: 3. ABC₃ Key idea: empirical formula from percentage: divide by atomic mass, then by the smallest value. C% = 100 - 32 - 20 = 48. Ele... Percentage composition, empirical and molecular formulae 1 answer