The calcium Ca in a 100.0 ml sample of natural water was determined by precipitating as CaC2O4 the precipitate was filtered, washed and ignited the end product was CaO (56.077 g/mol) and its mass was 0.440 g. Calculate the mass of Ca (40.078 g/mol) in water sample. Select one: a. 0.168 b. 0.580 C. 0.877 d. 0.294 e. 0.0965

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The calcium Ca in a 100.0 ml sample of natural water was determined by precipitating as CaC2O4 the precipitate was filtered, washed and ignited the end product was CaO (56.077 g/mol) and its mass was 0.440 g. Calculate the mass of Ca (40.078 g/mol) in water sample. Select one: a. 0.168 b. 0.580 C. 0.877 d. 0.294 e. 0.0965
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