X/Z = 0,7187
hidrura HxX si hidrura HzZ, unde x = valenta lui X si z= valenta lui Z
M.HxX/M.HzZ = 0,7058
100% HzZ ........................ 5,882% H
M.HzZ ................................. z g H
= 17z g/mol
daca z=1 => M.HzZ= 17 g/mol => HzZ = NH3 (H3N) => A.N = 14 g/mol
daca z=2 => M.HzZ= 34 g/mol => HzZ = H2S => A.S = 32 g/mol
M.HxX = 17x0,7058 = 12 g/mol = NU => NU NH3
M.HxX = 34x0,7058 = 24 g/mol = NU => NU NH3
X = 32x0,7187 = 23 => X= Na => HxX = NaH
2NaH + H2S --> Na2S + 2H2
NaH are punctul de topire mai mare