Jawabanmu

2014-03-11T11:50:12+07:00
Hukum avogadro
 \frac{mol O2}{mol N2}= \frac{vol O2}{vol N2}

 \frac{mol O2}{0,2} = \frac{5 liter}{5 liter}
mol O2 = 0,2
Jumlah atom oksigen = 2 x 0,2 x 6,02 x 10^23 = 2,4 x 10^23