Chemistry

How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?

  1. 👍 0
  2. 👎 0
  3. 👁 79
asked by Olivia
  1. Use PV = nRT and solve for n.
    P = (697-vapor pressure H2O @ 25C/760)
    V = 0.247 L
    T = 298 K
    n = number of mols. Then n = grams/molar mass. You know molar mass and n, solve for grams.

    1. 👍 0
    2. 👎 0
  2. So would i just convert 697 torr into atm and use that for pressure? or what do i do with the 25C/760?

    1. 👍 0
    2. 👎 0
    posted by Olivia
  3. It isn't 25C/760.
    See the later post where I broke this down. If you still have trouble, repost and make a note about what you don't understand.
    Ptotal = pgas + pH2O
    697 = pgas + vapor pressure H2O @ 25C.
    Solve for pgas. Then divide that number by 760 to convert to atm.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr? And would i just convert 697 torr into atm and use that for

    asked by Olivia on February 18, 2013
  2. Science

    How many grams of oxygen are collected in a reaction where 230. mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?

    asked by JJ on February 16, 2012
  3. chemistry

    How many grams of oxygen are collected in a reaction where 245 mL of oxygen gas is collected over water at a temperature of 25 ^\circ {\rm C} and a total pressure of 688 torr

    asked by raul on April 29, 2012
  4. chemistry

    A 2.45 gram sample of potassium chlorate is heated an the oxygen gas collected. what is the volume of the oxygen at STP. Is the oxygen gas itself 2.45 grams or do I have to subtract something from that?

    asked by Anonymous on November 23, 2008
  5. chemistry

    a 500ml sample of oxygen gas at 24 degree celsius was prepared by decomposing a 3% aqueous soution of hydrogen peroxide in the presence of manganese catalyst by the reaction: 2h2o2 = 2 h20 + o2... the oxygen was colletec by

    asked by Elizabeth on July 10, 2011
  6. Chemistry II

    17.5 mL of oxygen gas were collected at room temperature (22oC) and 100.2 kPa of atmospheric pressure. a) How many moles of oxygen gas were produced? b) What is the molar volume of the oxygen gas at the conditions in the

    asked by pasely on September 14, 2009
  7. science: chemistry

    When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are

    asked by Jane Doe on July 15, 2011
  8. Chemistry

    When a sample of potassium nitrate is heated, oxygen gas is produced. This gas, collected in a 750 milliliter flask, has a pressure of 2.8 atmosphere and the temperature is recorded to be 53.6°C. How many moles of oxygen gas are

    asked by Brina on April 16, 2014
  9. Chemistry II

    17.5 mL of oxygen gas were collected at room temperature 22C and 100.2 kPa of atmospheric pressure. a. How many moles of oxygen gas were produced? b.What is the molar volume of the oxygen gas at the conditions in the laboratory?

    asked by pasely on September 14, 2009
  10. Chemistry

    A certain compound contains carbon, hydrogen , and oxygen. When 1.00 grams of this compound are burned in oxygen gas 1.47 grams of CO2 and 0.600 grams of water are formed. When 2.75 grams of the compound are dissolved in 10.0

    asked by Patrick on January 16, 2011

More Similar Questions