Chemistry

posted by .

A 32.0 mL sample of hydrogen is collected over water at 20.0 degrees celcius and 750.0 torr. What is the volume of the dry gas at STP?

  • Chemistry -

    I forgot to add-- Vapor pressure of water at 20.0 degrees celcius is 17.5 torr.

  • Chemistry -

    (P1V1)/T1 = (P2V2/T2)
    P1 = 750 torr - vapor pressure H2O @ 20 degrees Celsius (note the correct spelling of Celsius).
    V1 = 32 mL
    T1 = change C to Kelvin.
    P2 and T2 are STP; i.e., 760 torr and 273 K.
    Post your work if you get stuck.

  • Chemistry -

    What do you mean by P1, meaning 750 torr - vapor pressure H2O @ 20 degrees Celsius?

  • Chemistry -

    750 torr - 17.5 torr = ?? torr = P1.
    According to Dalton's Law of Partial Pressure, the total pressure is the sum of the partial pressures in the gas.
    P(gas) + P(water) = total P = 750 torr. That's what you started with in the problem.

  • Chemistry -

    i don't understand the P2 and T2 part with the STP

  • Chemistry -

    No

  • Chemistry -

    29.4 mL

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. AP Chem

    a 4.22 gram sample of copper II sulfide was added to excess hydrocholoric acid with hydrogen sulfide gas being generated and collected over water. What volume of hydrogen sulfide gas would be collected at 32 degrees Celcius and 749 …
  2. 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 …
  3. chem help

    A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?
  4. chemistry help!

    A sample of methane gas, CH4 was collected over water at 25 degrees celcius and 720 torr. The volume of the wet gas is 2.50L. What will be the volume of the dry methane at a standard pressure?
  5. chemistry

    The volume of 02 collected over water at 25 Celcius and 740 torr was 250 mL. What volume will the dry 0x occupy at STP (Vapor pressure of water at 25 celcuis is 23.8 torr)
  6. Chemistry

    How would I go about doing this problem? 146 mL of wet H2 gas is collected over water at 29.0 degrees C and room pressure of 750 torr. Give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give
  7. chemistry

    146 mL of wet H2 gas is collected over water at 29.0 degrees celsius and room pressure of 750 torr. give the volume of the dry H2 gas collected at STP, give the mass of the dry H2 collected, and give the volume of the dry H2 at room …
  8. Chemistry 3A

    in a lab experiment, 133mL of gas was collected over water at 24 degrees Celsius and 742 torr. Calculate the volume that the dry gas would occupy at STP.
  9. Chemistry

    A sample of 40.0 mL of hydrogen is collected by water displacement at a temperature of 20 degrees Celcius. The barometer reads 751 torr. What is the volume of the hydrogen at STP (standard temperature and pressure)?
  10. science

    5 L OF H2 GAS WAS COLLECTED OVER WATER AT 25 CELCIUS AND 750 MM PRESSURE CALCULATE THE VOLUME OF DRY H2 AT STP AQUEOUS TENSION AT 25 CELCIUS IS 23 MM

More Similar Questions