4. The calcium content from an unknown sample weighing 1.23 g was determined by gravimetric determination. During the an

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4. The calcium content from an unknown sample weighing 1.23 g was determined by gravimetric determination. During the an

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4. The calcium content from an unknown sample weighing 1.23 g was determined by gravimetric determination. During the analysis, 0.44 g of CaC204.H20 precipitates was obtained. What is the percentage of calcium by weight in the sample? (5 marks)
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