Question

Calculati masa moleculara , raportul atomic si raportul de masa pentru urmatoarele formule :
Al₂ S₃
SO₃
H₂ SO₃
Nu ma pricep la chimie !!Ajutorr!!

Answer 1

Al2S3
raport atomic=Al:S=2.3
raport de masa =Al:S=54.96=9:16
compozitie procentuala:
MAl2S3=2×AAl+3×AS=2×27+3×32=150g
150gAl2S3......54gAl......96gS
100gAl2S3.......xgAl........zgS
x=100×54/150=calculeaza
z=100×96/150=calculeaza
SO3
raport atomic=S:O=1:3
raport de masa=S:O=32:48=2:3
compozitie procentuala:
MSO3=AS+3×AO=32+3×16=80g
80gSO3......32gS.....48gO
100gSO3.....xgS........zgO
X=100×32/80=calculeaza
z=100×48/150=calculeaza
H2SO3
RAPORT ATOMIC: H:S:O=2:1:3
raport de masa = H:S:O=2:32:48=1:16:24
compozitie procentuala
MH2SO3=2×AH+AS+3×AO=2×1+32+3×16=82g
82gH2SO3.........2gH......32gS.......48gO
100gH2SO3.....xgH..........ygS.......zgO
x=100×2/82=calculeaza
y=100×32/82=calculeaza
z=100××48/82=calculeaza