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in Chemistry by (59.7k points)
`IE_(1)` and `IE_(2)` of `Mg` are `178` and `348 kcal mol^(-1)`. The energy required for the reaction `Mg rarr Mg^(2+)+2e^(-)` is
A. `+170` kcal
B. `+526` kcal
C. `-170` kcal
D. `-526` kcal

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