Question

Calculati masa moleculara relativa
Mr(Al(OH)3)
Mr (FeCl2)
Mr(H2Co3)​

Answer 1

Răspuns:

Mr(Al(OH)₃) = A(Al) + 3 × A(O) + 3 × A(H) = 27 + 3 × 16 + 3 × 1 = 78 u.a.m.

Mr(FeCl₂) = A(Fe) + 2 × A(Cl) = 56 + 2 × 35,5 = 127 u.a.m.

Mr(H₂CO₃) = 2 × A(H) + A(C) + 3 × A(O) = 2 × 1 + 12 + 3 × 16 = 62 u.a.m.

-Mihai