Question

Listen A gas mixture contains O2. N₂, and Ar at partial pressures of 100, 150, and 200 torr, respectively. If CO2 gas is added to the mixture until the total pressure reaches 575 torr, what is the partial pressure of the CO₂? 575 torr 125 torr 450 torr 0.50 M E​

Answer 1

We can start by using Dalton's Law of Partial Pressures, which states that the total pressure of a gas mixture is equal to the sum of the partial pressures of each individual gas component.

Let PCO2 be the partial pressure of CO2 in the mixture after it is added. Then, we can set up the following equation:

PO2 + PN2 + PAr + PCO2 = Ptotal

Substituting in the given partial pressures and total pressure, we get:

100 torr + 150 torr + 200 torr + PCO2 = 575 torr

Simplifying the equation, we get:

PCO2 = 575 torr - 100 torr - 150 torr - 200 torr

PCO2 = 125 torr

Therefore, the partial pressure of CO2 in the gas mixture is 125 torr. Answer: B) 125 torr.