Author Question: The oxidation state of oxygen in OF2 is ________. A) +1 B) +2 C) 0 D) -1 E) ... (Read 76 times)

joe · **on:** Aug 27, 2018

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