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Homework Help: Estimation problem. help!

  1. Jan 25, 2010 #1
    1. The problem statement, all variables and given/known data

    Estimate to 1 significant figure the total # of air molecules in this room (l=20ft, w=14ft, H= 8ft) Find molecules/room

    2. Relevant equations
    1 mole = 22.4 liters
    6.02 x 10^23 molecules = 1 mole

    3. The attempt at a solution

    volume of room = 2240 ft^3 or approx 683 m^3

    6.02x10^23 Molecules / 1 mole x 1 mole/ 22.41 liters = 6.02 x10^23 molecules/ 22.41 liters.... I am stuck here. how do i figure out how many liters are in the room?
  2. jcsd
  3. Jan 26, 2010 #2


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    Science Advisor
    Homework Helper

    Welcome to PF!

    Hi Teenytiny1991! Welcome to PF! :smile:

    (oooh, you're even smaller than i am! :biggrin:)
    (try using the X2 tag just above the Reply box :wink:)

    How many cm3 to a litre?

    How many cm to a foot? :smile:
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