Synthesis problems

(See attached file for full problem description)

Calculate the masses of (a) Ca(NO3)2 and, separately, (b) NaCl...

Calculate the masses of (a) Ca(NO3)2 and, separately, (b) NaCl to add to a 0.150 mol/kg solution of KNO3 (aq) containing 500g of solvent to raise its ionic strength to 0.250 Answer: (a) 2.73 grams (b) 2.92 grams Please give full explainations

hA concrete pile from a waterfront pier...

A concrete pile from a waterfront pier was pulled from the harbor water at Port Charlotte. Its dimensions were 14 inches x 14 inches x 15 feet (1 meter = 3.28 feet) a) What is the surface area, expresses in square feet, of a single face of the pile? Exclude the ends of the pile. b) Determine the total surface area, expressed ...continues

A material is tested at 1 atmosphere and found to be an insulator...

1. A material is tested at 1 atmosphere and found to be an insulator. It is then very strongly compressed and found to have very much increased conductivity. Speculate on what changes may be happening to the energy band structure of the material.

Question set

6. A gas operates under isothermal conditions. The initial volume of gas in the pump is 22.4 liters, the pressure is one atmosphere and temperature is 273 deg K. if 0.6 mole of gas is released and the volume remains unchanged calculate the new pressure. 7. calculate the minimum energy a photon must have to produce an electr ...continues

A material in its normal condition has an effectively full valence band...

11. A material in its normal condition has an effectively full valence band and an empty conduction band. Explain why if the material is strongly compressed causing the two bands overlap the material changes its behavior and becomes much like a metal.

A gas has a diffusion coefficient of 3*10^-5m^2s^-1....

13. A gas has a diffusion coefficient of 3*10^-5m^2s^-1. Use this information to compare how long it will take to obtain molecular scale mixing of such a gas over i) distance 1*10^-4 m and ii) 10m

Which of the following species would you expect to be paramagnetic?

14. Which of the following species would you expect to be paramagnetic? Briefly explain the answers using molecular orbital energy level diagrams or molecular orbital electron configurations. N2, N2-, N2+, O2, N2^2- O2+, O2-, O2^2-

Atom questions

3. A material has an effectively full valence band and an empty conduction band. Explain why that if these two bands overlap the material behaves as a metal and if they are separated by a few electron volts in energy the material is an insulator. 4. Calculate the minimum energy a photon must have to produce an electron hole p ...continues

The temperature of the sea bed 60 m below the surface and at the surface are both 20C...

12. The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the works done on the rubber determine: i)the volume of the balloon at the sea bed and ii) the volume of the balloon after it has been allowed to float slowly up t ...continues