Notez fractiile cu / si inmultirile cu *
CaCO3=>CaO + CO2
MCaCO3=100
1 mol CaCO3 =100 g
MCaO=56
1 mol CaO = 56 g
p=mp*100/mip=>mp=p*mip/100=85*500/100=425g masa pura
In 100g CaCO3 ... 56g CaO
In 425 g CaCO3 ..... x g CaO
100/425=56/x =>x= 425 *56/100= 238 g CaO