Răspuns:
Explicație:
30g xg
CaCO3=CaO +CO2
100g 44g
x=30.44 :100=13,2 g CO2
13,2g yg
2NaOH +CO2= Na2CO3 +H2O
44g 106g
y=13,2 . 106 : 44=31,8g Na2CO3
n=31,8g : 106g/moli=0,3 moli Na2CO3
MCaCO3=40 +12 +3.16=100----->100g/moli
MCO2=12 +2.16= 44---->44g/moli
MNa2CO3=2.23 +12 +3.16=106----->106g/moli