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[" 59.A "100%" pure sample of a divalent...

[" 59.A "100%" pure sample of a divalent metal carbonate "],[" weighting "2g" on complete thermal decomposition "],[" releases "448cc" of carbon dioxide at STP.The "],[" cquivalent mass of the metal is "],[[" (1) "40," (2) "20],[" (3) "28," (4) "12]]

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