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If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of ...

If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of hydrogen gas would be liberated?
Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)
[ H = 1.0, Mg = 24.0 ]
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  • A 0.54g
  • B 0.70g
  • C 1.08g
  • D 1.40g
Correct Answer: Option A
Explanation:
24g of Mg will liberate 2g of H
: 6.5g of Mg will liberate Xg of H
= ( 6.5 X 2 ) / 24
= 0.5416g of Hygrogen ( H )

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