Ask questions and get helpful responses.

Chemistry

How many moles of helium are contained in a 5.00-L canister at 101 kPa and 30.0 degrees Celsius? I don't understand how to get the answer. My teacher didn't explain the work she just gave me the answer.

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
  1. Use PV = nRT
    P must be in atmospheres. 101 kPa = 1 atom (almost 1.00, technically it is 101/101.326 = ??. I don't know what your teacher recommended.)
    V = 5.00 L
    R = 0.08206 L*atm/mol*K
    T = 30.0 C which must be converted to Kelvin.
    K = 273 + 30 = ??
    Substitute these values into PV = nRT an solve for n.
    Using 101.325 kPa = 1 atm I obtained an answer of 0.200 moles.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
  2. 0.200

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Respond to this Question

First Name

Your Response

Still need help? You can ask a new question.