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Calculate the number of g -moles of CaO ...

Calculate the number of g -moles of CaO that could be obtained from 42.54g of `CaCO_(3)` and convert the number of g-moles to grams.

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No. of g-moles `=(42.54)/(100)=0.4254`.
mass of `CaO=0.4254xx56=23.8gl`
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