-calculez moli apa
niu(n)= N/N,A N,A-numarul lui Avogadro
n= 48,184x10²³molec/ 6,023x10²³molec/mol= 6mol H2O
-deduc din ecuatie moli Cu(OH)2
1mol...........................1mol
Cu(OH)2----> CuO+ H2o
n=6............................6mol
-calculez masa de Cu(OH)2 pur
m=nxM; m= 6mol(64gCu+2x1gH+ 2x16gO)/mol= 588gCu(OH)2 pur
-masa de Cu(OH)2 impur cu p=92%
p/100= m,pur/m,impur
92/100=588/ m,impur------------------------> calculeaza !!!!!
