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Which of the following ratios are needed to determine the mass of oxygen produced from the decomposition of 10 grams of potassium chlorate? Select all that apply. 2KClO3 → 2K + 3O2 Question 3 options: 1 mole KClO3112.55 g KClO3 31.998 g O21 mole O2 3 mole O22 mole KClO3 112.55 g KClO31 mole KClO3

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The ratios which are needed to determine the mass of oxygen produced from the decomposition of 10 grams of potassium chlorate are;

  • 31.998 g O2 : 1 mole O2
  • 3 mole O2 : 2 mole KClO3
  • 112.55 g KClO31 mole KClO3

From stoichiometry;

  • We can conclude that according to the reaction;

3 moles of oxygen requires 2 moles of KClO3 to be produced.

And from molar mass analysis;

  • 31.998 g O2 is equivalent to 1 mole O2
  • O2112.55 g KClO3 is equivalent to 1 mole KClO3

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