Răspuns:
formula sarii K2SO4
M= 174g/mol=174kg/kmol
niu=m/M= 850kg/174kg/kmol=4,885kmol=4885mol K2SO4
1mol K2SO4........2molK
4885mol..............niu= 9770molK
1molK...........N,A= 6,023X10²³atomi
9770mol.................N=5,9X10²⁷ atomi
Explicație: