Răspuns:
Explicație:
1.
n= m : M ; n= nr. moli ; m= masa subst. ; M= masa molara
MCO= 12 +16=28------> 28g/moli
n= 22,4g : 28g/moli=0,8 moli CO
2.
m= n . M
AAu=197-------->197 g/moli
m= 6 moli . 197g/moli=1182 g Au
3.
1mol S de atomi S-------------6,023.10²³atomi S
xmoli-------------------------------24,88 .10²³ atomi S
x=24,88 .10²³ : 6,023.10²³ =4,13083 moli de atomi S
