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What is the molar enthalpy change (ΔH) when 2.0 g of a substance is burned in excess oxygen, releasing 1500 J of energy? (Molar mass of the substance = 50 g/mol).
- A.15 kJ/mol
- B.30 kJ/mol
- C.75 kJ/mol
- D.150 kJ/mol
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