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OpenStudy (anonymous):
what massof calcium oxide CaO,forms when 25g calcium carbonate CaCO3 decomposes on heating?
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OpenStudy (aaronq):
Moles of CaCO3 = m/MW= (25g)/(100g/mol) = 0.25 moles CaCO3 -> CaO + CO2 Coefficients 1 1 1 Moles 0.25 x x Ratio: CaCO3:CaO 1:1 0.25 moles of CaO formed Mass CaO = (MW)(moles)= (56g/mol)(0.25)= 14g
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