28 g KOH is used to completely neutralize produced by heating 60 g impure sample

CHEMISTRY · Single correct · A Level · Chemistry · Amount of substance · Amount of substance

Problem

28 g KOH is used to completely neutralize CO2CO_2 produced by heating 60 g impure sample CaCO3CaCO_3 . The percentage purity of CaCO3CaCO_3 is : (1) 83.32 (2) 20.83 (3) 41.66 (4) 40.00

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