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massa CaCO3 = 90% × 1000kg = 900 kg
mol CaCO3 = massa/Mr
= 900kg/ 100gr/mol = 9kmol
CaCO3 -> CaO + CO2
mula2 9 kmol - -
bereaksi 9 kmol 9 kmol 9 kmol
sisa - 9 kmol 9 kmol
massa CaO = mol x Mr = 9kmol x 56gram/mol = 504 kg