Consider two containers A and B where A is a rigid container and B is a container with a massless, frictionless piston that maintains constant pressure. NH₃ (g) is injected into both containers and allowed to come to equilibrium. At equilibrium, 2 atm of Argon gas is injected into each container. Explain any changes (up, down or no change) to the equilibrium concentrations of NH₃ , N₂ and H₂ ?

a) do the partial pressures of container A change or remain the same?

b) what happens to the volume in container B?

Examine the various exchange rate policies implemented by Turkey since 1980 in the context of expenditure-switching and expenditure-
changing purposes. Give specific examples and indicate the years or periods. By using data, explain which policy was more effective for each period. Answer whether changes after the 2000s can be classified under a different category. In your response, make use of proper terminalogy, evidence, ratios, and theoratical background you learned during the course.

Examine the various exchange rate policies implemented by Turkey since 1980 in the context of expenditure-switching and expenditure-
changing purposes. Give specific examples and indicate the years or periods. By using data, explain which policy was more effective for each period. Answer whether changes after the 2000s can be classified under a different category. In your response, make use of proper terminalogy, evidence, ratios, and theoratical background you learned during the course.

Explain (in your own words) the shape of the Hayashi track for a pre-main sequence star, noting the
most important physical changes that occur in a star as it moves from being a collapsing cloud of
gas to being a hydrogen burning main sequence star. Explain how this varies for low and high mass
stars. What is the best wavelength range to detect pre-main sequence stars, explain why.

Please answer all sections as they are about the same concept.

Sodium Borohydride Reduction of a Ketone

1. How will the dibenzalacetone product be isolated from the reaction mixture and how will it then be further purified? How will the product be characterized?

2. What apparatus and conditions (solvent, temp., reaction time, etc) will be used for the reaction?

3. Identify which is the reducing agent and which is the oxidizing agent in the reaction of benzophenone with sodium borohydride and explain your reasoning, ie. show the changes in oxidation states (best to give a drawing as per the introduction)?  

A 4% annual coupon bond has 5 years remaining until maturity and is priced to yield 6%.

(a) What is the price per 100 of par?

(b) For this bond, estimate the price value of a basis point by first considering an increase in yield and then a decrease in yield.  

(c) Now show that for very small price changes, the absolute value of a bond’s price change does not differ much conditional on whether the yield change is a rise or a fall in yield.

Thanks   

a) Define the following terms: (i) ferroelectric (ii) piezoelectric

b)Draw perspective and plan views of the unit cell of cubic barium titanate. Label the fractional co-ordinates of the non-equivalent ions and state the co-ordination number of the ions. [6 marks] (ii) Describe, with the aid of appropriate diagrams, the various structural changes which occur as a barium titanate crystal cools from 200°C to -100°C. Specify the temperatures of the relevant phase transitions.