A sample of xenon gas is collected over water at 31.1°C. The barometric pressure of the room is 989.7 mmHg. What was the pressure due to the xenon gas

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Ptotal = Pxenon + PH2O.

Ptotal = barometer reading
PH2O = vapor pressure H2O at 31 C.(in mm Hg)
Substitute and solve for Pxenon.l

To find the pressure due to the xenon gas, we need to find the partial pressure of the xenon gas.

Partial pressure is the pressure exerted by an individual gas component in a mixture. It is calculated by subtracting the vapor pressure of the solvent (in this case, water) from the total pressure.

To start, let's find the vapor pressure of water at 31.1°C. We can use a vapor pressure chart or search for the value online.

The vapor pressure of water at 31.1°C is approximately 31.8 mmHg.

Next, subtract the vapor pressure of water from the total pressure to get the partial pressure of the xenon gas:

Partial pressure of xenon gas = Total pressure - Vapor pressure of water

Partial pressure of xenon gas = 989.7 mmHg - 31.8 mmHg

Partial pressure of xenon gas = 957.9 mmHg

Therefore, the pressure due to the xenon gas is approximately 957.9 mmHg.