A catalytic converter in an automobile uses a palladium or platinum catalyst to

Question

A catalytic converter in an automobile uses a palladium or platinum catalyst to convert carbon monoxide gas to carbon dioxide according to the following reaction: 2CO(g)+O2(g)?2CO2(g) A chemist researching the effectiveness of a new catalyst combines a 2.0 : 1.0 mole ratio mixture of carbon monoxide and oxygen gas (respectively) over the catalyst in a 2.45?L flask at a total pressure of 740 torr and a temperature of 552 ?C. When the reaction is complete, the pressure in the flask has dropped to 554 torr .

Part A

What percentage of the carbon monoxide was converted to carbon dioxide?

Explanation / Answer

P1 / n1 = P2 / n2

740 / 3 = 554 / n2

n2 = 2.246

let x = fraction of CO reacted

final = 2 x + 3 (1 - x)

2.246 = 2x + 3 - 3x

2.246 = 3 - x

x = 0.754

% Carbon monoxide = 75.4 %

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