1. aflu nr.at C din 72gC--daca e gresit, este vina ta, ca nu ai scris corect tema
n(niu)C= m/A--> n= 72g/12g/mol= 6molC
1mol at...........................N,A=6,023X10²³atomi
6mol..........................................6x6.023x10²³atomi....................
2.Sulful are numarul atomic,in tabel,Z=16---> inseamna ca atomul are 16
electroni si 16 protoni
1mol at.S CONTINE 6,023x10²³atomi
2mol at.S......................2X6,023X10²³atomi
1atom ,..contine ..16protoni
2x6,023x10²³atomi.......16x2x6,023x10²³protoni................
N,A este numarul lui Avogadro
