Răspuns:
H¹O² → H₂O₁ → H₂O - apă
M(H₂O) = 2 × A(H) + A(O) = 2 × 1 + 16 = 18 g/mol
H¹S² → H₂S₁ → H₂S - acid sulfhidric (hidrogen sulfurat)
M(H₂S) = 2 × A(H) + A(S) = 2 × 1 + 32 = 34 g/mol
N³H¹ → N₁H₃ → NH₃ - amoniac
M(NH₃) = A(N) + 3 × A(H) = 14 + 3 × 1 = 17 g/mol
P³H¹ → P₁H₃ → PH₃ - fosfan / fosfină
M(PH₃) = A(P) + 3 × A(H) = 31 + 3 × 1 = 34 g/mol
H¹Cl¹ → H₁Cl₁ → HCl - acid clorhidric
M(HCl) = A(H) + A(Cl) = 1 + 35,5 = 36,5 g/mol
-Mihai
