Question
Mon May 28, 2012 By:
 

The wt of 360 ml of a diatomic gas at 0 degree celcius and 2 atom presses 1 mg. Find out wt of 1 atom? explain me nicely.

Expert Reply
Thu May 31, 2012
PV = nRT
2 x 360 x 10 -3  = n X .082 x 273
n= 760 x 10 -3 / 22.386
n= 760/22386  = .0339
1 mol = 6.023 x 10 -23 atoms
.0339 mol = .033 X  6.023 x 10 23 atoms
               =.2044 x 1023 atoms
so, .2044 x 10 23 atoms weight = 10 -3 g
       1 atom = 10-3 /.2044  x 1023 = .0048 X 10-23 g
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