2KClO3=2KCl+3O2
100/5=90/x
x=4,5 kg KClO3 pur
MKClO3= 122,5 kg/kmol
MO2=32 kg/kmol
2*122,5/4,5=3*32/y
y=1,76 kg
n = 1,76/32=0,055 kmoli O2
CaCO3=CaO+CO2
MCaCO3=100 g/mol
MCaO=56 g/mol
100-35=65% puritate
100/400=65/x
x=260 g CaCO3 pur
100/260=56/y
y=145,6 g CaO
n = 145,6/56=2,6 moli CaO