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Sebanyak 249,5 gram kristal C u S O 4 ​ . x H 2 ​ O dipanaskan sehingga menghasilkan 159,5 gram C u S O 4 ​ , menurut reaksi: C u S O 4 ​ . x H 2 ​ O ( s ) → C u S O 4 ​ ( s ) + + 4 m ux H 2 ​ O ( g ) Rumus senyawa kristal tersebut adalah... (Ar Cu = 63,5; S = 32; O = 16; H = 1)

Sebanyak 249,5 gram kristal  dipanaskan sehingga menghasilkan 159,5 gram , menurut reaksi:

Rumus senyawa kristal tersebut adalah... (Ar Cu = 63,5; S = 32; O = 16; H = 1)

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Pembahasan

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Suatu kristal barium klorida ( M r ​ = 208) mengandung 14,74% air kristal ( air = 18). Rumus kristal barium klorida adalah...

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