Please show all work.

3. The dissociation of the HO-H bond in water requires 493 kJ/mol.

a) How much energy, in joules, is required to break the HO-H bond in a single water molecule?

b) What wavelength of electromagnetic radiation would have the energy required to break a HO-H bond?

c) In what region of the spectrum (X-ray, UV, Vis, IR, etc.) does this radiation appear?

How many molecules of NH3 are produced from 8.50x10^-4 g of H2

Part1: C3H8(g)+5O2(g)→3CO2(g)+4H2O(g) ΔH∘rxn=−2044kJ

A)ΔSsys>0

or

B) ΔSsys<0

Part 2:

A)ΔSsurr>0

or

B)ΔSsurr<0

Part 3)

Part 4) N2(g)+O2(g)→2NO(g) ΔH∘rxn=+182.6kJ

A)ΔSsys>0

or

B) ΔSsys<0

Part 5)

A)ΔSsurr>0

or

B)ΔSsurr<0

Part 6)

Show the balanced oxidation and reduction half – reactions UNDERLINE THE REDUCING AGENT and BOX THE OXIDIZING AGENT in the final balanced equation:

NiO₂ (s) + Ag (s) ------>    Ni²⁺ (aq) + Ag⁺ (aq)      (Acidic Solution)

One of the treatments for breast cancer is the administration of selective aromatase inhibitors. Aromatase is an enzyme involved in the synthesis of various estrogens, such as estrone and estradiol. Aromatase inhibitors can be divided into two categories, type I and type II. Type I inhibitors are irreversible inhibitors of aromatase. Type II inhibitors are competitive inhibitors of aromatase. Given what you know about enzyme inhibition, explain the differences between irreversible and competitive enzyme inhibition.

Synthesis of crystalline materials is greatly facilitated if the reaction mixture is homogeneous on an atomic scale. Describe some (at least three) of the routes that could be used to synthesise a sample of BaTiO3 powder and compare the advantages/disadvantages of each. Describe the strategies that can be adopted to synthesise thin films of semiconductor materials such as CdS or GaAs.

What are self-assembled monolayers and how are they characterized?

What are self-assembled monolayers and how are they characterized?

What are NHCs and how do they differ from "normal" carbenes?(NHCs is N-heterocyclic carbenes)

For a particular redox reaction NO is oxidized to NO3

How does NMR allow us to understand the connection between bond rotation and the kinetic energy within the sample being analyzed?

At 1 atm, how much energy is required to heat 37.0 g of H2O(s) at –10.0 °C to H2O(g) at 169.0 °C? Helpful constants can be found here.

If your favorite silver jewelry ever tarnishes and you happen to have some aluminum foil on hand, you can actually get rid of some of that tarnish. The tarnish here is actually silver sulfide. If you put the jewelry and aluminum into a dish with enough water to cover them both, the following reaction will occur: 3Ag₂S + 2Al --> 6Ag + Al₂S₃. If you have a total of 5.0 g of Al foil accessible to you, how many grams of Ag₂S (thus, loosely speaking, how much jewelry) could you theoretically "clean"? You must show all work clearly and in detail to receive credit. All numbers immediately following elemental symbols should be understood as subscripts. (NOTE: If you try this at home, you may want to dissolve some baking soda in your solution to help neutralize the smell, because some of the sulfur here will escape as a gaseous product and not smell very pleasant!)

A buffer solution is prepared by mixing 20.0 mL 0.45 M HAc (acetic acid) with 35.0 mL 0.45 MNaAc (sodium acetate) (a) What is the amount of 4.0 M HAc which must be added to this buffer solution to double [H3O+]? (b) What is the amount of 2.0 M HCl that must be added to decrease the pH by 0.50? (c) How much NaOH(s) in g has to be added to the solution to raise the pH by 2.00?