How many moles of oxygen molecules would be produced from the decomposition of 2.50 moles…

Chemistry JAMB 1993

How many moles of oxygen molecules would be produced from the decomposition of 2.50 moles of potassium trioxochlorate (V)?

  • 2.50
  • 3.50
  • 3.75 checkmark
  • 7.50

The correct answer is: C

Explanation

2KClO3(s) → 2KCl(s) + 3O2(g)
From the above balanced equation, 2 moles of reactant decomposed to give 3 moles of O2 i.e.
i mole of reactant will produce (3)/(2) moles O2.
∴ 2.5 moles KClO3 will give
= 3.75 moles
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