The question goes like this. Boron often forms compounds that do not comply with the octet rule that are termed electron deficient. BF3, whose structure is shown below on the left, is an example of an electron deficient compound. Note that the central boron atom is only surrounded by 6 valence electrons. The resonance struct
Please see the attached file for full problem description. 10a. Determine the number of CH2CH2 monomeric units, n, in one molecule of polyethylene with a molar mass of 40,000 g. 10b. What is the total number of carbon atoms in this polyethylene? 8. Equations 9.1 and 9.2 (listed below) show the polymerization of two ethy
Na(s)+ H2O = Na<+> + H2
A nonelectrolyte solution adsorbs on an electrically neutral solid through a liquid. Two surfaces of this type are brought close to one another in the liquid such that they interact. Will they attract or repel one another? Which equations bear this out? How does the separation distance between the two solids come into play h
I need help describing an experiment where one could measure the value of the extinction coefficient of a solution with a concentration (c mol/L) of chlorophyll in water for a given wavelength. **This does not need to be a lengthy answer, nor does it need to describe all the materials needed---I really just need something conce
Interchange between units in this case those of force, pressure and distance and an insight to dimensional analysis
Using "dimensional analysis" show that 1 L kPa = 1 J. Hints : P= F/A; 1 Pa = 1 N/m^2; energy = F x d
Chemistry - Gases Using "dimensional analysis" show that 1 L kPa = 1 J. Hints : P= F/A; 1 Pa = 1 N/m^2; energy = F x d
Anton Von L. a 17th century pioneer in the use of the microscope, described the microrganisms he saw as "animalcules" whose length was "25 thousandths of an inch." How long were the animalcules in meters.
I am having a problem really understanding conversion factors between meters, centimetres, and kilometres. Where do I get the conversion factor? Can you give me a step-by-step on how to solve them? Please use conversion factors to convert 4.2 yards to meters, centimeters, micrometers and kilometers. Thank you.
Write a balanced equation for: Aluminum chloride reacts with copperII carbonate Then solve: if 45 grams of copperII carbonate is used how much Aluminum carbonate will be formed(in grams).
For the reaction of nitric acid with calcium hydroxide, predict how much water is produced (in grams) from 46grams of calcium hydroxide.
Balance and find moles and grams of the remaining reactants & products for the following: Barium flouride and lead nitrate react and form 6.2g of lead fluoride
Why or why isn't it possible to have pi bonds between two atoms without there being a sigma bond?
How do you work out which ionic molecules are more polarised and which are less covalent
A mixture of helium and neon gases is collected over water at 28.0 C and 745 mmHg. if the partial pressure of helium is 368 mmHg, what is the partial pressure of neon?
A certain strain of tobacco mosaic virus has Mm = 4 *10^7 kg/k mol. How many molecules of the virus are present in 1 cm^3 of a solution that contain0.1mg of virus per cm^3
What volume, in milliliters, of a 2.00 M aqueous KOH solution would be needed to neutralize a) 110.0 mL of 0.0550 M aqueous H2SO4? b) 45.00 mL of 2.50 M aqueous HCl?
A closed vessel contains moist air at 20 degree celcius, the relative humidity being 30 %. What would be the relative humidity become if the vessel were cooled to 10 degree celcius ? SVP of watyer at 20 deg celcius = 17.5 mm SVP of water at 10 deg celcius = 9.2 mm
A Hydrogen atom, treated as a point mass, is confined to an infinite one-dimensional square well of width 1.0nm. How much energy does it have to give up to fall from the level with 5 to the lowest energy level? The answer needs to be in Joules. This problem deals with quantum part of Physical chemistry.
If you start with 64 g of a material with a half-life of 10 years, how much will be left at the end of 40 years?
Which element(s) has an outermost electron that could be described by the following quantum numbers: (3,1,-1,+1/2) ?
Calculate the amount of energy associated with a photon of light with a frequency of 6.23 x 10E14 /s.
Calculate the frequency, in units of "per second", of light with a wavelength of (a) 540 nm, and (b) 650 nm.
A certain colour of light has a wavelength of 550 nm. What is the energy possessed by a photon of such light? (a) 2.42 x 10E-19 (b) 5.45 x 10E14 J (c) 3.61 x 10E-14 J (d) 3.61 x 10E-19 J (e) 5.37 x 10E-19 J
How would you describe how to separate a mixture of oil, sand, and saltwater?
Whiskey can have an alcohol content in the 50 to 60% range whereas the upper limit for alcohol content in beers and wines is only about 10%. Why is this?
What precipitate forms when solutions of the following are mixed: K+, Ca2+, NH4 1+, and Cl-, NO3 1-, CO3 2-?
Explain what is meant by a Scientific Method.
A shipment of iron-fortified powdered baby formula has been rejected by the buyers in China because the power is off-color. The color of the powder should be cream-colored, but this shipment is reddish-brown to gray. Investigation by the manufacturer shows that the manufacturing process is simply "bucket chemistry". This mean
Find the following: <r> for the 2p0 <r2> for the 2p1