December 2018 2 205 Report
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Sebanyak 8,6 g mineral yang tersusun dari kalsuim sulfat hidrat, CaSO₄ . xH₂O. Jika dipanaskan menghasilkan 6,8 g kalsium sulfat, CaSO₄ (Ar Ca = 40; S = 32; O = 18; H = 1), rumus molekul mineral tersebut adalah...
(A) CaSO₄ . H₂O
(B) CaSO₄ . 2H₂O
(C) CaSO₄ . 5H₂O
(D) CaSO₄ . 6H₂O
(E) CaSO₄ . 7H₂O

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