a) Estimate the decay heat load from a 3000 MWt reactor at one day, one week, one month, and one year after shutdown from a 2-year run. b) Estimate the rate of heat up in a reactor core that has lost all of its coolant. Consider the decay heat loads found above. Assume the heat capacitance of the dry reactor core is 16,500 Btu/°F.

Compound A and Compound B are binary compounds containing only elements X and Y. Compound A contains 1.000 g of X for every 1.914 g of Y. Which mass ratio for Compound B below follows the law of multiple proportions with Compound A?

1.301 g X: 3.369 g Y

0.6966 g X: 2.003 g Y

1.908 g X: 2.739 g Y

2.710 g X: 5.545 g Y

0.4106 g X: 2.699 g Y

The force constants for F2 and I2 are 470. and 172 Nm−1, respectively. The atomic masses in amu are as follows: 19 F - 18.9984, 127 I - 126.9045.

1) Calculate the ratio of the vibrational state populations n1/n0 for F2 at 310 K

2) Calculate the ratio of the vibrational state populations n1/n0 for F2 at 900 K

3) Calculate the ratio of the vibrational state populations n2/n0 for F2 at 310 K .

4) Calculate the ratio of the vibrational state populations n2/n0 for F2 at 900 K .

5) Calculate the ratio of the vibrational state populations n1/n0 for I2 at 310 K

6) Calculate the ratio of the vibrational state populations n1/n0 for I2 at 900 K

7) Calculate the ratio of the vibrational state populations n2/n0 for I2 at 310 K .

8) Calculate the ratio of the vibrational state populations n2/n0 for I2 at 900 K .

If you add 35.6mL of 5.20M Hcl to 35.6mL of 7.40M NaOH, the solution that you generate is what percent NaCl? (Keep in mind the following... you must balance the equation to ge the answer and you must also consider what is the final volume of this solution?)(molar mass of NaCl is 58.44g/mol)

A student placed 14.5g of glucose (C6H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100mL mark on the flask was reached. The flask was then shaken until the solution was uniform. A 40mL sample of this glucose solution was diluted to 0.500L. How many grams of glucose are in 100mL of the final solution?

Compare samples of helium and neon gases at 25°C.

(a) Which gas has the highest average molecular speed? Explain your answer.

(b) Which gas has the highest average molecular kinetic energy? Explain your answer.

The following data is available for a solution of lysozyme.

Determine the molar mass and osmotic virial coefficient for lysozyme.

Mass percent KHP using and indicator.

Please show your work in chemical units, with known and unknown.

Show how you would determine the molarity of a NaOH using the titration of the NaOH with a known mass of KHP as a primary standard. Then determine the mass percent of an unknown sample of KHP. Please show how your calculation for your mass of the unknown KHP sample, average mass percent KHP and molarity of the NaOH. You may have as many theoretical samples as you wish.

You begin with:

-G known KHP and ml unknown NaOh used for the standardization of Naoh

and

- G of unknown KHP and ml unknown NaOh used for the unknown KHP

How do GMOs relate to chemistry and everyday life? What are the pro's and con's of using GMO's/Pesticides? What are the dangers associated with their usage? Are there natural pesticides available? Do they work as well?

A. Which of the following buffer systems would be the best choice to create a buffer with pH = 9.05?
HF/KF
HNO2/KNO2
NH3/NH4Cl (correct answer)
HClO/KClO

B. For the best system, calculate the ratio of the masses of the buffer components required to make the buffer. Express your answer using two significant figures.

m(NH3)/m(NH4Cl) =

How to identify the kinetic pathway or thermodynamic pathway based on example? Show 2 or 3 examples

also, show how to determine the value from keq and delta G based on your figure.

a. (3 pts) All Brønsted-Lowry acids contain the hydrogen ion, H+ . True False

b. (3 pts) You can use any acid/conjugate base pair in making a buffer. True False

c. (3 pts) Concentration does not matter for acids/conjugate bases in buffers. True False

1) Predict the sign, (+) or (-), for ∆H and ∆S for the following reactions.

2 C(s) + O (g)         2CO(g)                                 ∆H: _____                  ∆S: _____

CO₂ (s)      CO₂ (g)                                              ∆H: _____                  ∆S: _____

N₂(g) + 3H₂(g)      2NH₃(g)                                 ∆H: _____                  ∆S: _____

2) Use the standard entropy values below to calculate the entropy change (∆S^o_rxn) for the following balanced equation. N₂ (g) + 2 O₂ (g) --> 2 NO₂ (g)

Species        S^{o , (J/K*mol)}   

N₂(g)            191.5                                

O₂(g)            205.0                                                     

NO₂(g)         240.0

3) A reaction for which ∆H and ∆S are both negative will be:     

a. spontaneous at high temperatures.

b. spontaneous at low temperatures.

c. spontaneous at all temperatures.

d. never be spontaneous

e. more information is needed to determine spontaneity.

Answers I got: 1) - + , + - , + - 2) -121.5 3) I think its A.

Thanks

1. What is the change in pH when 10.0 mL of 0.010 M HCl is added to 500 mL of pure water.

2. What is the change in pH when 10.0 mL of 0.010 M NaOH is added to 500 mL of pure water.