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0.7324 g of zinc dust, containing Zn and ZnO were dissolved in dil H2SO4 liberated 224 mL of H2 at NTP

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0.7324 g of zinc dust, containing Zn and ZnO were dissolved in dil H2SO4 liberated 224 mL of H2 at NTP. Calculate the % of Zn metal present in the sample. (Zn = 65.4).

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Correct answer is 89.3%

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