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mol CO2 = massa : Mr = 0,22 : 44= 5x10^-3 mol
mol H2O = massa:Mr = 0,045:18 = 2,5x10^-3
mol CO3:mol H2O = x : y/2
5x10^-3 : 2.5x10^-3 = x : y/2
x : y = 1 : 2
Jd, rmus empirisnya adlh CH