12. Calculate E°cell and indicate whether the overall reaction shown is spontaneous ornonspontaneous.Overall reaction:(A) = -2.891 V, nonspontaneous (B) = -2.891 V, spontaneous(C) = 2.891 V, nonspontaneous (D) = 2.891 V, spontaneous(E) none of these

7. Which of the following statements is incorrect? (A) NF3 is a polar molecule. (B) The hybridization of the central atom is sp3 in ? (C) According to the molecular orbital model, the bond order of P2 molecule is three. (D) A material is made from Al, Ga, and As. The mole fraction of each element is 0.25, 0.26, and 0.49, respectively. This material would be an p-type semiconductor. (E) none of these

12. Calculate E°cell and indicate whether the overall reaction shown is spontaneous or
nonspontaneous.

Overall reaction:

(A) = -2.891 V, nonspontaneous
(B) = -2.891 V, spontaneous
(C) = 2.891 V, nonspontaneous
(D) = 2.891 V, spontaneous

(E) none of these

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