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i have attached the question, its 3 questions.please show step by step working

i have attached the question, its 3 questions.please show step by step working

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Note that you have to find volume of H2 (not ZnCl2) at STP. I am sure about
this.
Molar mass of HCl = 36.5 g/mol
Mol in 286 g HCl = 286 g / (36.5 g/mol) = 286 /36.5 mol
From balanced chemical...

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