Răspuns:
s=109,9g ceea ce inseamna ca in 100g apa..........109,9gKNO3 si
in (1oo+109,9)g sol........109,9g
150g...........................X
X=m=78,5g KNO3
M,KNO3=101g/mol
niu=m/M=78,5/101=0,77mol
1mol............N,A= 6,022X10²³molec
0,77..........................x=N=6=4,637x10²³molec
s= 60,5g
m,apa= niuxM= 19,5X18g=351g
100g APA........60,5g NaNO3
351g................x=md=212,35g NaNO3
ms= md+m,apa= 212,35+351=>563,35g
Explicație:
