Răspuns:
Explicație:
6g H
MH2O= 2 + 16=18-----> 18g/moli
18g H2O----------------2g H
xg H2O---------------------6g H
x= 18 . 6 : 2= 54 g H2O
MNH3= 14 + 3=17-----> 17g/moli
17g NH3--------------3gH
yg NH3-----------------6gH
y= 17.6 : 3 = 34g NH3
MH2CO3= 2 +12 + 3.16= 62-------> 62g/moli
62g H2CO3-------------2gH
zg H2CO3-------------------6gH
z= 62 .6 : 2= 186 g H2CO3