December 2018 1 112 Report
Sebanyak 28,6 gram Na2CO3.xH2O dipanaskan sehingga semua air kristalnya menguap, massa zat padat yang tersisa adalah 10,6 gram. Tentukan rumus senyawa hidrat tersebut. (Ar Na = 23, C = 12, O = 16, H = 1)

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