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Sample of impure magnesium is reacted with dilute sulphuric acid to give the respective salt and hydrogen.

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Sample of impure magnesium is reacted with dilute sulphuric acid to give the respective salt and hydrogen. If 1 g. of the impure sample gave 298.6 cc. of hydrogen at s.t.p. Calculate the % purity of the sample. [Mg = 24, H = 1].

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22400 cc of H2 is produced from 24 g pure magnesium

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