The calcium in 0.80 g sample is precipitated as CaC2O4. The precipitate is washed, dried and ignited to CaCO3 and found to weigh 0.3 g.
The percentage of CaO in the sample is
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Explanation:
Now, to know the percent composition of Carbon and Oxygen . We will divide their weight with the total weight of CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). % O = 32.00/44.01 =0.7271 =72.71 %O in CO2.
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