Răspuns:
Explicație:
336 g Ca(OH)2
masa de Ca(NO3)2
336g xg
Ca(OH)2 + 2HNO3 = Ca(NO3)2 + 2H2O
74g 164g
x= 336 . 164 : 74=744,65 g Ca(NO3)2
n= 744,65g : 164g/moli=4,54 moli Ca(NO3)2
MCa(OH)2 = 40 + 2.16 + 2=74------> 74g/moli
MCa(NO3)2= 40 + 2.14 + 6.16=164------< 164g/moli