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Homework Help: Atoms contained in Ar

  1. May 5, 2010 #1

    fcb

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    1. The problem statement, all variables and given/known data
    How many atoms are contained in 15 litres of Ar at STP


    2. Relevant equations


    3. The attempt at a solution
    I just did 15/22.4 = 0.669642
    0.669642 x 6.022x1023

    =4.0325x1023

    Is this correct. Thanks so much for your helo
     
  2. jcsd
  3. May 5, 2010 #2

    Borek

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    Staff: Mentor

    Correct approach, incorrect significant digits.

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    methods
     
  4. May 5, 2010 #3

    fcb

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    Can you give me a hint as to where i went wrong.
     
  5. May 5, 2010 #4

    Borek

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    Staff: Mentor

    Your final answer should have the same amount of significant figures as your data. Otherwise calculations are correct.

    --
    methods
     
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