A scientist measures the standard enthalpy change for the following reaction to be -222.0 kJ:
2H₂O₂(1) 2H₂O(l) + O₂(g)
Based on

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A scientist measures the standard enthalpy change for the following reaction to be -222.0 kJ: 
2H₂O₂(I)→ 2H₂O(l) + O₂(g) 
Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H₂O(I) is ___ kJ/mol.

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A scientist measures the standard enthalpy change for the following reaction to be -222.0 kJ: 2H₂O₂(1) 2H₂O(l) + O₂(g) Based on this value and the standard enthalpies of formation for the other substances, the standard enthalpy of formation of H₂O(1) is