Răspuns :
Masa molara H₂O=2*1+1*16=18g
1 mol..............18g H₂O
x moli.............36g H₂O
x=1*36/18=2 moli
1 mol..............18g H₂O
x moli.............36g H₂O
x=1*36/18=2 moli