Question

qual a massa de cal apagada necessaria para obtencao 900gramas de carbono de calcio

Answer 1

Cal apagada = Ca(OH)2.

Ca(OH)2 + H2CO3 <-> CaCO3 + 2 H2O

1,0 mol Ca(OH)2 — 1,0 mol CaCO3
74,0g Ca(OH)2 — 100,0g CaCO3
t — 900,0g CaCO3
t = 666,0g Ca(OH)2.