Răspuns:
Explicație:
1.
a . 80 g NaOH
n= m : M
M= 23 + 16 +1 = 40-----> 40g/moli
n= 80g : 40g/moli = 2moli NaOH
b. 4,48 L N2
n= 4,48 L : 22,4 L/moli = 0,2 moli N2
c. 12,044 .10 la 24 = 120, 44 .10²³molecule O2
n= 120,44 .10²³ : 6,022.10²³ = 20 moli O2
2.
3moli NH3
m= n . M
m= 14 + 3= 17------> 17g/moli
m= 3moli .17 g/moli= 51 g NH3
VNH3 = 3moli . 22,4 L /moli = 67,2 L
