Răspuns:
1.
SO2
r.at.S: O=1:2
r.m.S:O=32:32=1:1
HNO3
r.at.H:N:O=1:1:3
r.m.H:N:O=1:14:48
Al2O3
r.at. Al: O=2:3
r.m.Al:O=54:48=9:6
CaCO3
r.at.Ca:C:O=1:1:3
r.m Ca: C:O=40:12:48=10:3=12
2.
MSO3=32+3×16=89g/mol
80gSO3.......32gS.......48gO
100gSO2.......x%S.........y%O
x=100×32/80=calculează
y=100×40/80=calculează
MCO2 =12+2×16=44g/mol
44g CO2.......12gC.......32gO
100gCO2......x%C.........y%O
x=100×12/44=calculează
y=100×32/44=calculează
