Răspuns:
Explicație:
A.
MN2 = 2 .14 = 28-----> 28g/moli
m= n . M
m= 0,6moli . 28g/moli= 16,8 g N2
B.
n= m : M
MP4 = 4 . 31 = 124 ------> 124g/moli
n= 1550 g : 124g/moli = 12,5 moli P4
C.
MCl2= 2 . 35,5 = 71------> 71g/moli
n = 142 g : 71 g/moli= 2moli Cl2
1mol Cl2-----------6,023 .10²³molecule
2moli-----------------x
x= 2 . 6,023 .10²³ = 12,0 46 .10 ²³ molecule clor
D.
n CO2 = 12,046 .10²³ : 6,023.10²³ =2moli CO2