Calculate the oxidation number of: a. N in NO2- b. P in P2O5

10 Calculate the oxidation number of: Cl in Ba(CIO;)2 a b S in S,O,2

Which of the following are incorrectly paired? a. Downs cell – electrolyzes molten sodium chloride b. Alumina – pure aluminum oxide c. Hall-Heroult process – uses cryolite in production of aluminum d. Mercury cell – used in preventing contamination of NaOH by NaCl e. All of these are correct.

Assign oxidation numbers to the all the atoms in Fe2O3 Fe = O = Enter all numbers with a  + or - sign in front of the number if the number is not 0.

Please answer the attached question:

What is the oxidation number on the element X   in the compound H2XO4? a) +3 b) +6 c) +2 d) +4

(III) ion? 6. The sulfite ions, SO;², is strong reducing agent. a. Balance the following half reaction: SO,² > SO,² (under acidic conditions) D. Write out the balanced reaction for the reduction of Fe*3 to Fe*2 with SO,² reducing agent. 7. Iron(II) compounds in foods are more easily absorbed by the body than iron(III) compounds. Based on the experiment, why is adequate amounts of Vitamin C necessary for good health? Experiment 9 0xidation and Rodusti

What is the free energy change for the following reaction at 25 °C if the entropy change at this temperature is - 10 J/molK? 3 A (g) + B (s) 2 C (g) + 3.40 kJ ------ OA. 3.30 kJ/mol O B. + 0.420 kJ/mol - 6.38 kJ/mol OC. -0.420 kJ/mol OD. + 6.38 kJ/mol OE.

7. Assign oxidation numbers to each element in the following species: Cr₂O²- A: +6, -2

In which of the following species does sulfur have the lowest oxidation number? A) S²- B) SB C) SO,²- D) SO,²- E) S₂0,²-