Mr(Al2O3) = 2*Ar(Al) + 3*Ar(O) = 2*27 + 3*16 = 102 а.е.м.
M(Al2O3) = 102 г/моль
Mr(BaCl2) = Ar(Ba) + 2*Ar(Cl) = 137 + 2*35.5 = 208 а.е.м.
M(BaCl2) = 208 г/моль
Mr(Al2O3) = 2*Ar(Al) + 3*Ar(O) = 2*27 + 3*16 = 102 а.е.м.
M(Al2O3) = 102 г/моль
Mr(BaCl2) = Ar(Ba) + 2*Ar(Cl) = 137 + 2*35.5 = 208 а.е.м.
M(BaCl2) = 208 г/моль