Oxygen Can Be Produced in the Laboratory by the Reaction

question 43

Multiple Choice

Oxygen can be produced in the laboratory by the reaction: 2KClO₃(s)  2KCl(s) + 3O₂(g)
How many moles of potassium chlorate are needed to produce 257 mL of oxygen,collected over water at 14C and 97.6 kPa? The vapor pressure of water at 14C is
1.60 kPa.

• A)6.89  10 ^{ 3}
• B)7.00  10 ^{ 3}
• C)7.12  10 ^{ 3}
• D)2.06  10 ^{ 3}
• E)1.55  10 ^{ 3}

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