Nitrogen and oxygen do not react appreciably at room temperature, as illustrated by our atmosphere. But at high temperatures, the reaction below can proceed to a measurable extent. N2(g) + O2(g) ⇔ 2 NO(g) At 3000 K, the reaction above has Keq = 0.0153. If 0.1852 mol of pure NO is injected into an evacuated 2.0-L container and heated to 3000K, what will be the equilibrium concentration of NO?

1. What is the total number of electrons that occupy a shell, n?

2. List the relative energies for the different subshells.

3. What are the relative energies of orbitals within a shell?

4. How many electrons can be accommodated in each orbital orientation?

5. How many s-orbitals are there in a shell?

6. How many p-, d- and f- orbitals are there in a given shell?

7. What is an abbreviated or condensed electron configuration?

8. Why is it important to identify valence electrons?

9. Define:

-Transition metals

-Main group elements

10. How do metallic behavior and electron configuration relate?

11. How does one specifically determine the anomalous configurations of transition

and inner transition elements?

12. How does electron configuration relate to atomic properties?

13. What is the atomic radius (bonding atomic radius or covalent radius)?

14. What must you consider when comparing atoms for size (radius)?

15. What is ionic radius?

16. What must you consider when comparing ions for size?

17. How do you determine the magnetic properties of an atom?

18. What are successive ionization energies?

19. What are the trends in the second ionization energy?

20. What is oxidation? Reduction?

21. What is the trend for metallic reactivity? What is its trend on the periodic table?

22. What is the trend for the nonmetallic character? What is its trend on the periodic

table?

23. What is electronegativity? What is its trend on the periodic table?

Determine the volume (in mL) of 0.442 M potassium hydroxide (KOH) that must be added to 475 mL of 0.0992 M ascorbic acid (C₅H₇O₄COOH) to yield a pH of 3.89.



Assume the 5% approximation is valid and report your answer to 3 significant figures. A table of pKa values can be found here.

You have solid calcium carbonate and inorganic carbon in equilibrium in a lake at pH 7. Use equilibrium calculations to show that due to this equilibrium the calcium concentration is ~0.5 mM.

Write the balanced overall reaction from these unbalanced half-reactions

I have a couple of pre lab questions regarding N-phenylmaleimide.

1) why it is necessary to prevent N-phenylmaleimide from overheating when recrystallizing???

2) what would be the precautions, in terms of reagents, to be taken in consideration for the preparation of N-phenylmaleimide???

3) what is the reaction solvent for preparing N-phenylmaleimide from maleanilic acid?? what is the recrystallization solvent of this??

*there is no data these are pre-lab worksheet 

draw the hybrid structure of the cyclopentadienyl anion that ligates to the iron in ferrocene and acetylferrocene. draw three of the possible five resonance structures which aid chemists in understanding the distribution of charge by starting with one possible lewis structure and using curved arrow notation to show the movement of electrons to the next. Classify the anion as "aromatic ," anti-aromatic, or non-aromatic

A 5.00 g sample of H2O is removed from a freezer and heated from an initial temperature of -5.00 oC through to a final temperature of 102.0 oC.

(a) Given the following data, calculate the amount of energy that has to be absorbed by the H2O during the whole process.

Freezing point of H2O = 0.00oC;

Boiling point of H2O = 100.oC

ΔHfusion of H2O = 6.01 kJ mol-1

ΔHevaporation of H2O = 40.7 kJ mol-1

Specific heat capacity of ice = 2.05 J g-1 K-1;

Specific heat capacity of water = 4.18 J g-1 K-1

Specific heat capacity of steam = 2.08 J g-1 K-1

(b) Calculate the percentage of the total energy required for the overall process in (a) that is used just in heating the liquid water.

(c) Calculate the mass of ice at 0.00oC, that can be melted in 30 minutes by a heater that produces 8000 kJ of energy per hour but in such a way that only 70% of the heat produced is absorbed by the ice.

Determine the pH of an HF solution of each of the following concentrations. In which cases can you not make the simplifying assumption that x is small? (Ka for HF is 6.8×10−4.)

a) 0.260 M

b) 4.80×10⁻² M

c) 3.00×10⁻² M

Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.0 g of ascorbic acid dissolved in 220 g of water has a density of 1.22 g/mL at 55 ∘C.

Calculate the mass percentage.

Calculate the mole fraction.

Calculate the molality.

Calculate the molarity of ascorbic acid in this solution.

Phathalic acid, H2C8H4O4, is a diprotic acid and has a concentration of 2.9 M. Ka1 = 0.0012 and Ka2 = 3.9 x 10-6. Estimate the concentration of [HC8H4O4-] and [C8H4O4-2] at equilibrium. Determine Kb1 and Kb2. Determine the pH of the solution at each proton dissociation. 11. Calculate the molar solubility of calcium hydroxide (Ksp = 4.8 x 10^6

I NEED TO KNOW HOW DID THEY GET THIS ANSWER PLEASE 0.0012 = x2/2.9 x = 0.059 M equilibrium concentration of HC8H4O4- = 0.059 M

1. Calculate the pH of the following solutions.

a. A solution containing 0.100 M KH2PO4 and 0.200 M K2HPO4

b. A solution prepared by mixing 100.0 mL 0.100 M H3PO4 with 50.0 mL 0.150 M K3PO4

c. A solution prepared by mixing 100.0 mL of 0.100 M H3PO4 and 80.0 mL of 0.200 M KOH.