n(niu)= 560g/28g/mol= 20molN2-------> n= 20x2 molN
N= nxN,A---> N= 40molx6,023x10²³ at/mol= ................calculeaza !
n,N2:n,O2= 112/28 : 32/32= 4 : 1
n=N/N,A=> 3molH2 N,A numarul lui Avogadro
H2+Cl2--> 2HCl
1mol...........2mol
3mol..........n=6mol
m= n,molxM,g/mol==> m=6x36,5=md ,masa dizolata in solutie
c/100=md/ms..inlocuieste datele si calculeaza ms !!!!
