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Problem- A 1.00 sample of solid magnesium was burned in oxygen to give a 1.658 g sample of pure MgO. The heat given off in this reaction was 24.76 kJ. Given this information, calculate the enthalpy of formation of 1 mol of MgO.

1) -601.8 kJ

2) +601.8 kJ

3) +103.4 kJ

4) -24.76 kJ

5) +24.76 kJ

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Category:- Chemistry
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