20. For the reaction (unbalanced), what volume (mL) of a 1.25 M solution of FeCl2 is required to react completely with molecules of O2? (A) 76.5 (B) 38.3 (C) 125.2 (D) 57.4 (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

20. For the reaction (unbalanced), what volume (mL) of a 1.25 M solution of FeCl2 is required to react completely with molecules of O₂?
(A) 76.5
(B) 38.3
(C) 125.2
(D) 57.4
(E) none of these

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