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✨ Best Answer ✨

(COOH)₂・2H₂O
H → 1 、C → 12、O → 16
COOH → 12+16+16+1 = 45
H₂O → 1×2 +16 = 18
(COOH)₂・2H₂O → 45×2 + 2×18 = 90 + 36 = 126

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