Răspuns:
1) MCaCO3=40+12+3×16=40+12+48=100g/mol
2) MAlCl3=27+3x35,5=133,5g/mol
3) MPbO2=207+2×16=239g/mol
4) MMg(NO3)2=24+14×2+6×16=24+28+97=148g/mol
5) MBaSO4=147+23+4×16=234g/mol
6) MZn(OH)2=65+2×1+2x16=99g/mol
7) MH2SiO3=1×2+28+3×16=2+28+48=78g/mol
8) MK2Cr2O7=2×39+2×52×16×7=294g/mol
9) MFe2(SO4)3=2x56+3×32+12×16=400g/mol
10) MCuBr2=64+2x80=224g/mol
Explicație:
