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Hi!
suppose, the formula given to u is H2S,
then, u split it
H2S is combined by hydrogen and sulphur.
so,
symbol H S
subscript 2 1(wen nothin is ritten, it means it is 1)
now cross multiply it i.e,
hydrogen's valance is 1 and sulphur's valance is 2.
i hope its d rite ans!
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In order to find molecular formula from empirical formula, one needs to know the molar mass of the molecular formula. Then you simply divide the molar mass of the molecular formula by the molar mass of the empirical formula to find out how many empirical formulae are in the molecular formula. Then you multiply the subscripts in the empirical formula by that number.
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