1)
mNaNO3=23u+14u+48u=85u
% O = (48/85)*100% = 56,47 %
mCaCO3=40u+12u+48u=100u
% O = (48/100)*100% = 48 %
mAl2(SO4)3=54u+96u+192u=342u
% O = (192/342)*100% = 56,14%
2)
- tlenek fosforu 5 ----- P4O10
4P + 5O2---->P4O10
- tlenek glinu ------Al2O3
2Al(OH)3---T--->Al2O3 + 3H2O
chlorek cyny 4 ------SnCl4
Sn + 2Cl2---->SnCl4
- siarczan 4 ołowiu 4 ----Pb(SO3)2
PbO2 + 2H2SO3---->Pb(SO3)2 + 2H2O