Oxygen Gas Can Be Prepared in the Laboratory by Heating

question 28

Multiple Choice

Oxygen gas can be prepared in the laboratory by heating potassium chlorate, so that it decomposes according to the equation: 2KClO₃(s) → 2KCl(s) + 3O₂(g)
What would the pressure of O₂ be in a 2.50 L glass container at 22.0^oC if 6.50 g of KClO₃ is decomposed?

• A)0.0796 atm
• B)1.78 atm
• C)6.62 atm
• D)0.771 atm
• E)0.0575 atm

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