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Balance the equation and find its classification (combination (C), decomposition (D), single replacement (SR), double replacement...

Balance the equation and find its classification (combination (C), decomposition (D), single replacement (SR), double replacement (DR) or combustion (CB))

b. ____K (s) + ____H2O (l) → ____KOH (aq) + ___H2 (g)

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