1..m H2O = 200 * 18=3600 g
18g H2O.................................16g O
3600g H2O..................................x
x=3600*16:18=3200 g O
2. mH2O=100*18=1800g
18 gH2O.......................................2gH
1800 g H2O.......................................x
x=1800*2:18=200 g H
Masa moleculara NaOH=40
40g NaOH.........................................1g H
y......................................................200g H
y=40*200=8000 g NaOH
Succes!
