Răspuns:
Explicație:
-se foloseste relatia : n= m: M in care n=nr. moli ; m=masa subst.(g)
M= masa molara(g/moli)
AZn=65------>65g/moli
MH2SO4=2+32+4.16=98------>98g/moli
m= n .M
m=0,1moli .65g/moli=6,5 g Zn
m=2moli .65g/moli=130g Zn
m=0,5moli.65g/moli=32,5 g Zn
m=0,1moli.98g/moli=9,8 g H2SO4
m=2moli.98g/moli=196g H2SO4
m=0,5moli.98g/moli=49 g H2SO4