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Of the following. which acids are weak acids? I. HBr II. HF III. HNO3 IV. HNO2 V. H2CO3 VI. H3AsO4

Use the standard half-cell potentials listed below to calculate the equilibrium constant (K) for the following balanced redox reaction at 25 OC. 3Cl2 (g) + 2Fe (s) à 6 Cl- (aq) + 2 Fe3+ (aq)             Cl2 (g) + 2 e- à 2Cl- (aq)                   EO = +1.36 V             Fe3+ (aq) + 3 e- à Fe (s)                  EO = -0.04 V

According to Lewis theory, a base……

A reaction is shown below                     2A + 3B →  Products   Experiment     Initial [A]     Initial [B]    Initial Rate (M.s -1)            1     0.10 M     0.30 M       7.20 X 10 -5            2     0.10 M     0.60 M       1.44 X 10 -4 What is the reaction order for reactant B?  Hint: rate of reaction = K [A]m X [B]n ; K is a constant

What is the Kb of a weak base if a 0.250 M solution has a pH of 11.59?

Which of the following compound is incorrectly identified as to type of compound it is?          Substance        Type of compound    A KOH Strong base B HClO 4 Strong acid C HNO 2 Weak acid D NH 3 Insoluble base (in water) E H 2SO 3 Weak acid

From a consideration of the Lewis structure (see the attached file below), what are the formal charges? Question 68.docx        N   C   O   (A)  -1   0   0  (B)  -1  +1   -1  (C)  0  0  0  (D)   0  0   -1  (E)   -2  0   +1

The rate constant for the first-order decomposition of N2O is 3.40 s-1. What is the half-life of the decomposition? ** Don’t forget the units. round to the third decimal place [BLANK-1]

Which answer has 4 significant figures?

The sum of 26.83 + 2.7120 + 7.15 + 138.12 + 150.2619 expressed to the proper number of significant figures is: