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 Form 3 Chemistry Questions and Answers on The Mole

Zinc metal and hydrochloric acid reacts according to the following equation. Zn(s)+2HCl(aq)ZnCl2(aq)+H2(g)
1.96g of Zinc metal were reacted with 100cm3 of 0.2M hydrochloric acid.
(a) Determine the reagent that was in excess.
(b) Calculate the total volume of hydrogen gas that was liberated at S.T.P.[Zn=65.4,molar gas volume =22.4 litres at S.T.P]

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