Question

Calculati masele urmatoarelor molecule si aratati si ce cantitante de subsanta se gaseste un mol de molecula. Sulfrat de cupru , Azot de magneziu , Acid sulfuric



2. Masa moleculara se calculeaza facand .......... maselor .........componentilor

3. Calculati masele urmatoarelor molecule ; NH3, CH4, CaCi2

Answer 1

MCuSO4 = ACu+AS+4AO = 64+32+4×16 = 160g/mol
MMg(NO3)2 = AMg+2(AN+3AO) = 24+2(14+3×16) =24+28+96 = 52+96 = 148g/mol
MH2SO4 = 2AH+AS+4AO = 2×1+32+4×16 = 98g/mol

2. suma, tuturor

3. MNH3 = AN+3AH = 14+3×1 = 17g/mol
MCH4 = AC+4AH = 12+4×1 = 16g/mol
MCaCl2 = ACa +2ACl = 40+2×35,5 = 111g/mol