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15 March, 21:22

The amount of calcium in a 15.0-g sample was determined by converting the calcium to calcium oxalate, CaC2O4. The CaC2O4 weighed 40.3 g. What is the percent of calcium in the original sample

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  1. 15 March, 21:51
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    128 gram of CaC2O4 contains 40 gram of Calcium

    40.3 gram of CaC2O4 cotnains = 40*40.3/128 = 12.59 gram of Calcium

    out of 15 gram 12.59 gram is Calcaim that means around 50% of orginal sample has Calcium
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