Răspuns:
Explicație:
HgO
raport atomic = r.a.
r.a.=1 Hg : 1O= 1 : 1
raport de masa = r.m.
r.m.= AHg : AO= 201 : 16
Compozitie procentuala prin masa moleculara
MHgO=201 +16=217------>217g/moli
217 g HgO--------201 g Hg-----------16 g O
100 g----------------xg--------------------------yg
x=100.201 :217=
y=100.16 : 217=
calculeaza !
