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Chemistry

10.47 g of a compound contained 6.25 g of metal A and rest non-metal B. Calculate the empirical formula of the compound (At. wt of A = 207, B = 35.5)

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Answer

Element% compositionAt. wt.Relative no. of atomsSimplest ratio
Metal A6.252076.25207\dfrac{6.25 }{207} = 0.030.030.03\dfrac{0.03}{0.03} = 1
Non-metal B4.2235.54.2235.5\dfrac{4.22}{35.5} = 0.110.110.03\dfrac{0.11}{0.03} = 3.96 = 4

Simplest ratio of whole numbers = A : B = 1 : 4

Hence, empirical formula is AB4

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