Răspuns:
Explicație:
n= m: M
m= n .M
MMg(OH)2= 24 +2.16 +2= 58-------> 58g/moli
m= 3moli. 58g/moli=174 g Mg(OH)2
5 m moli= 0,005moli Al2O3
MAl2O3= 2.27 + 3.16=102--------> 102 g/moli
m= 0,005moli . 102g/moli= 0,51 g Al2O3
MCa(OH)2=40 +2.16 +2=74-------> 74g/moli
m= 500moli . 74g/moli= 37000g = 37 kg Ca(OH)2
M= 3moli . 40g/moli=120g Ca
