The oxidation state of oxygen in OF2 is ________. A) +1 B) +2 ...

[joe]

The oxidation state of oxygen in OF2 is ________.
 
  A) +1
  B) +2
  C) 0
  D) -1
  E) -2

Question 2

The molecular geometry of the H3O+ ion is ________.
 
  A) linear
  B) tetrahedral
  C) bent
  D) trigonal pyramidal
  E) octahedral

Question 3

The decomposition of N2O5 in solution in carbon tetrachloride proceeds via the reaction 2N2O5 (soln)  4NO2 (soln) + O2 (soln)
 
  The reaction is first order and has a rate constant of 4.82  10-3 s-1 at 64 C. If the reaction is initiated with 0.072 mol in a 1.00-L vessel, how many moles remain after 151 s?
  A) 0.067
  B) 0.074
  C) 0.035
  D) 9.6
  E) 1.6  103

Question 4

Calculate the percent ionization of formic acid (HCO2H) in a solution that is 0.322 M in formic acid and 0.178 M in sodium formate (NaHCO2 ). The Ka of formic acid is 1.77  10-4.
 
  A) 35.6
  B) 0.1011
  C) 10.8
  D) 1.03  10-3
  E) 3.488

[LVPMS]

Answer to Question 1

B

Answer to Question 2

D

Answer to Question 3

C

Answer to Question 4

B

[joe]

Excellent

[LVPMS]

Gracias!