Răspuns:
Explicație:
NaOH
a. r.a.= 1 : 1 : 1
b. r.m.= 23 : 16 : 1
c. M= 23+16 +1=40--------> 40g/moli
n= m: M
m= n . M
m= 3moli.40g/moli= 120g NaOH
d. 1mol NaOH---------6,023.10²³molecule
2 moli----------------------------------x
x= 2. 6,023. 10²³=12,046. 10²³molecule NaOH