Jawabanmu

2014-05-12T20:59:39+07:00
Dik: V= 5x10^-13 m3
      H2= 2x1 = 2
      O = 16
dit: N?
jawab: mH2O = 18 gr/mol
          mair  = roair x Vair
                  = 1000 kg/m3 x 5x10^-13 m3
                  = 5x10^-10 kg
                  = 5x10^-13 gr
n = m/M
   = 5x10^-13 gr/ 18 gr/mol
   = 0,27x10^-13 mol
   = 27x 10^-15 mol
N= n x Na
  = 27 x 10^-15 mol x 6,02 x 10^23 molekul/mol
  = 162,54 x 10^-8