# chemistry

posted by .

50 ml of Argon is collected at 60.0 degree C and 820.0 torr how much this sample weigh in grams?

• chemistry -

Use PV = nRT and solve for n = number of mols. Then n = grams/molar mass and solve for grams. Don't forget T must be in kelvin.

• chemistry -

do I need to consider the vapor pressure of Argon at 60.0 degree C

• chemistry -

I don't understand your question. The pressure of Ar in the flask is 820 torr. I guess we could call that its vapor pressure.
Remember to convert 820 torr to atm and T to kelvin.

• chemistry -

my instructor said we need to use the pressure due to water vapor. i'm confused

• chemistry -

Then you didn't post all of the problem. The problem you posted doesn't have any water in it. If you collected the Ar over water and the total pressure is 820 torr, then
Ptotal = 820 = pAr + pH2O
Look up vapor pressure H2O at 60.0 C and subtract from 820 to find pAr.
T must be in kelvin
P must be in atm (for PV = nRT)
V must be in L.

## Similar Questions

1. ### Chemistry

Three of the primary components of air are carbon dioxide, nitrogen, and oxygen. In a sample containing a mixutre of only these gases at exactly one atmosphere pressure, the partial pressure of carbon dixoide and nitrogen are given …
2. ### Chemistry

A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of O2(g) collected is 400.0ml at 25 degree Celsius. The atmospheric pressure is 680 torr and the vapor pressure …
3. ### Chemistry

A sample of 50.0mL of argon is collected at 60*C and 820 torr. What does the sample weigh?
4. ### Chemistry

If 42.8 L of helium gas is collected at a temperature of 277K and has a mass of 4.84 grams, what is the pressure of the sample in torr?
5. ### chemistry

A 200-mL sample of Oxygen gas is collected at 26 degrees C and a pressure of 690 torr. What volume will the gas occupy at STP (0 degree C and 760 torr)
6. ### chem

a volume of 122mL of argon, Ar, is collected at 500 degrees C and 758 torr. what does this sample weigh?
7. ### chemistry

a volume of 122mL of argon, Ar, is collected at 500 degrees C and 758 torr. what does this sample weigh?
8. ### Chemistry 3A

A volume of 122mL of argon, Ar, is collected at 50 degrees Celsius and 758 torr. What does this sample weigh?
9. ### chemistry

1)A sample of CO2 gas which weighs 0.85 grams has a volume of 1.30 liters when collected at 30°C. What would be the pressure of the gas sample?
10. ### Chemistry

A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 200. torr, what is the pressure of methane, in torr?

More Similar Questions