An equilibrium mixture of N2, H2 and NH3 at 700K contains 0.036M H2 and 0.015M H2. At this temperature, Kc for the reation N2(g)+3H2(g) <> 2NH3(g) is 0.29. What is the concentration of NH3?

A25.0 mL sample of 0.100 M NaOH is titrated with a 0.100 M HNO3 solution. Calculate the pH after the addition of 0.0, 4.0, 8.0, 12.5, 20.0, 24.0, 24.5, 24.9, 25.0, 25.1, 26.0, 28.0, and 30.0 of the HNO3.

Compare and contrast SDS-PAGE and Native-PAGE. Discuss the chemical and mechanistic similarities and differences between the two. Discuss why a scientist would prefer one method over the other.

please match nitrogen from the phrase that best describes it:

_Most abundant form of nitrogen

_disrupts 03-o2 equilibrium and is a greenhouse gas

_most oxidized form of nitrogen

1. NO

2. N2

3. N2O

4.NO3

5.HNO2

Indicate whether the following statements are correct or incorrect, and justify your answer:

a)The presence of more dislocations increases the yield strength of an annealed metal.

b)Dislocation move more readily in a solid solution alloy than in a pure metal.

c)A fine-grained alloy will have a higher yield strength than a corse-grained

alloy of the same chemical composition.

Consider the following reaction at equilibrium.

2H2O (g) + 2SO2 (g) <--> 2H2S (g) + 3O2 (g)

What effect will adding more H2S have on the system?

A) The reaction will shift in the direction of reactants

B) The equilibrium constant will increase

C) The reaction will shift in the direction of products

D) The equilibrium constant will decrease

E) No change will be observed

Can you explain why the one that is the right answer correct and along with also explaining why the others are wrong?

Compare and contrast Oxidative Phosphorylation and Photophosphorylation. Write out at least 5 similaritites, differences, or some combinaion of the 2.

Which scenario will result in the greatest decrease in energy for the system?

(a) The system releases 234 cal of heat and has 430 J of work done to it.

(b) The system gains 904 J of heat and does 23.9 cal of work.

(c) The system does 321 cal of work and loses 2.34 kJ of heat.

(d) The system has 1.09 kJ of work done to it and loses 892 cal of heat.

(e) The system gains 1000. cal of heat and does 4.814 kJ of work.

Find Delta G^o for the following reaction, using delta Hf^o and S^o values.
MnO2(s) + 2CO(g) -> Mn(s) + 2CO2(g)

1 a) What health benefit is derived by adding fluoride to toothpaste or drinking water? What are the possible hazards?

b) What is the present recommended concentration of fluoride in Toronto’s tap water and over the counter toothpaste?

Will all haloalkanes that have ethane as the parent chain not have numbers in the name? Also, could there be a haloalkane with methane as the parent chain. If so, could you give an example?

Need molecular equations (Ionic and net when needed) for the following:

Calcium chloride and sodium carbonate

Copper (II) Nitrate and Sodium Hydroxide

Copper (II) Nitrate and Sodium Sulfate

Magnesium Chloride and Sodium Sulfate

Magnesium Chloride and Sodium Carbonate

Ca + 2 H₂O ------> Ca(OH)₂ + H₂

If we have 4 moles of Ca and 4 moles of water – how much Calcium Hydroxide can we make? What would be the limiting reagent and what would be the one in excess?

Define the terms accuracy and precision. Give examples which illustrate the difference between terms.