A .200 mol sample of a mixture of nitrogen and carbon dioxide with a total pressure of 840. torr is exposed to solid calcium oxide which reacts with the carbon dioxide to form solid calcium carbonate. Assume the reaction goes to completion. After the reaction was complete, the pressure of the gas had dropped to 320 torr how many moles of carbon dioxide were in the original mixture?(assume no change in volume or temperature)
P(CO2)= 520 tor
P(total)=840 torr
n(total)= .200mol
n(CO2)=x mol
P(CO2)=P(total)*(x/n(total))
520=840*(x/.200)
x=.123 mol CO2
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