Răspuns:
M KOH=1X39+1X16+1X1=55+1=56
M KCL= A K +A Cl = 39+35, 5=74,5 g /mol
M Na2SO4= 2× A Na +A S +4×A O = 2×23+32+4×16= 46+32+64=142
M Ca(NO₃)₂
vezi in imagine >
M Al2(SO4)3=2*MAl+3*MS+12*MO=2*27+3*32+12*16=54+96+192=342g/mol
M H2CO3 = 2× A H + A C + 3× A O = 2×1+12+3×16 = 2+12+48=62 g /mol
M NaNO3 = 23 + 14 +3×16 = 85 g/mol
M Al2O3 = 2M Al + 3 M O = 2·27 + 3·16 = 102
M NH3=1x14+3x1=14+3=17
M NACL=A Na+A Cl =23+35=58
M H2O=2×AH+AO=2×1+16=18
