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25-01-2016
Chemistry

contestada

Which balanced equation represents a chemical change? A) H2O() + energy → H2O(g) B) 2H2O() + energy → 2H2(g) + O2(g) C) H2O() → H2O(s) + energy D) H2O(g) → H2O() + energy

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30-01-2016

Although your question is incomplete, I believe 'B' is the answer, as the Oxygen separates from the Hydrogen

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