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A chemist weighed out 5.16 g of a mixture containing unknown amunts of BaO(s) and CaO(s) and placed the sample in a 1.50-L flask containing CO2(g) at 30.0°C and 750. torr. After the reaction to form BaCO3(s) and CaCO3(s) was completed, the pressure of CO2(g) remaining was 230. torr. Calculate the mass percentages of CaO(s) and BaO(s) in the mixture.

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