Example- 40 Calculate the empirical formula of a compound that contains 26.6% potassium, 35.4% chromium and 38.1% oxygen [Given K = 39.1; Cr = 52; O = 16]
Sol. Element Percentage Atomic mass
Potassium 26.6 39.1
Chromium 35.4 52.0
Oxygen 38.1 16.0
Relative no. Simplest ratio Simplest whole no. ratio
of atoms
Therefore emperical formula is .
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