Question

Calculați masa moleculara pentru următoarele formule Al2O3,NO2,V2O5,KOH,Ca(OH)2,Fe2O3,Al2(SO)3,HCl,H2SO3,H2CO3​

Answer 1

Al2O3
R.A=Al:O=2:3
R.M=2•Aal:3•Ao=2•27:3•16=54:48/:2 27:24
M=2•Aal+3•Ao=54+48=102
NO2
R.A=N:O=1:2
R.M=1•An:2•Ao=1•14:2•16=14:32/:2 7:16
M=1•An+2•Ao=14+32=46
V2O5
R.A=V:O=2:5
R.M=2•AV:5•Ao=2•51:5•16=102:80/:2 51:40
M=2•AV+5•Ao=102+80=182