1. Assuming that the gases do not react with each other, what is the total press
ID: 534745 • Letter: 1
Question
1.
Assuming that the gases do not react with each other, what is the total pressure, in atm, in the container if the partial pressure of the O2 gas is 2.1 atm?
2.
A gas mixture contains O2, N2, and Ar at partial pressures of 125, 175, and 245 mm Hg, respectively. If CO2 gas is added to the mixture until the total pressure reaches 623 mm Hg, what is the partial pressure, in millimeters of mercury, of CO2?
Pressure = mm Hg
3.
A piece of Mg metal is placed in a 1.00-L container with pure N2. The N2 is at a pressure of 1.12 atm and a temperature of 24°C. One hour later, the pressure has dropped to 0.914 atm and the temperature has increased to 26°C. Calculate the number of moles of N2 that reacted with the Mg.
Explanation / Answer
1)
Note : you did not mention the gases.
2)
partial pressures of O2 = 125 mm Hg
partial pressures of N2 = 175 mm Hg
partial pressures of Ar= 245 mm Hg
total pressure = 623 mm Hg
total pressure = partial pressures of all gases
623 = 125 + 175 + 245 + PCO2
PCO2 = 78 mm Hg
partial pressure of CO2 = 78 mmHg
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