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What is the enthalpy of reaction of Pb2+(aq) + 4OH-(aq) –> PbO2(s) + 2H2O(L)? Answer in kJ/mol. Do not type units. Do not use scientific notation. Please be careful with sig figs. Enthalpy of formation (kJ/mol) Pb2+ (aq) -1.7 hydroxide (aq) -230.0 PbO2 (s) -277.4 water (L) -285.83 Please be careful with sig figs.

Draw the Lewis Dot Structure of chlorate (ClO3-). How many resonance structures are in chlorate? Answer numerically.

If the OH- concentration in a bottle of an ammonia (NH3) based cleaner is 4.0 x 10-5 M, what is the H+ concentration? (Kw = 1.0 x 10-14)  

How many neutrons are in 143Nd? Answer numerically.

Calculate the solubility of solid Ca3(PO4)2 (Ksp = 1.3 x 10-32) in a 0.20 M Na3PO4 solution.

Calculate the pH for each of the following: 0.0067M HCl       _________   0.2 M LiOH       _________   1.7 M HF (Ka = 7.2 x 10-4) _________

(a) What is the pH of the solution that results from the addition of 13 mL of 2.0M Na2HPO4 to 15 mL of 1.5 M of Na3PO4? (Ka = 3.6 x 10-13) (b) What is the new pH if 3.5 mL of 0.65M NaOH is added to the solution?

What are the metabolic roles of ATP, NAD+, and NADPH?

Which of the following types of eukaryotic gene regulation takes place at the level of DNA?

If the molar solubility of Ni3(PO4)2 is 2.13 x 10-7 mol/L. Calculate the Ksp value for the solid.