Răspunsuri

2014-11-12T08:22:16+02:00
N=m/Mr=0,2g/40g/mol=0,005mol=5mmol

n=N/Navogadro, N=n*Navogadro=0,005mol*6,023*10²³atomi/mol=3,0116*10²¹atomi

raspunsul d practic
1 5 1