Determining the thermochemical equations

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The standard enthalpy of formation of Mg3N2 is represented by which of the following thermochemical equations?

Group of answer choices

1) 3 Mg (s) + N2 (l) → Mg3N2 (s)

2) 1/3 Mg (s) + N2 (g) → 1/3 Mg3N2(s)

3) 3 MgS (s) + NH3 (g) → Mg3N2 (s) + 3H2S (g)

4) 3 Mg (s) + N2 (g) → Mg3N2 (s)

5) 6 Mg (s) + N2 (g) → 2Mg3N2 (s)

Reference no: EM132508377

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