What volume of hydrogen is produced at s.t.p. When 2.60 g of zinc reacts with…

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Chemistry WAEC 1999

What volume of hydrogen is produced at s.t.p. When 2.60 g of zinc reacts with excess HCI according to the following equation? Zn(s) + 2HCI(aq) → ZnCI 2(aq) + H2(g) [Zn = 65; 1 mole of a gas occupies 22.4dm3 at s.t.p]

  • 0.040dm 3
  • 0.896dm 3 checkmark
  • 5.82dm 3
  • 8.62dm 3

The correct answer is: B

Explanation

Zn + 2HCI → ZnCI2 + H2; 65g of Zn produces 22.4 dm3 of H2; .: 2.6g of Zn will produce = 2.6/65 x 22.4 = 0.896 dm3
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