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1 July, 00:09

Given the equation zn (s) + 2 hcl (aq) → zncl2 (aq) + h2 (g), what mass of hydrogen gas is produced when 2.8 g zn is reacted with excess aqueous hydrocholric acid?

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  1. 1 July, 00:29
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    Zn+2hcl"zncl2+h2

    108+2 (1+35.5) "108+71+2

    179.2"179+2

    108g of zn gives 2g of h when reacted with excess hcl

    therefore 2.8g of zn in the same reaction will give 2.8*2/108=0.0518
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