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(a) What is the trend in first ionization energies as one proceeds down the group 7A elements? Explain how this trend relates to the variation in atomic radii.
(b) What is the trend in first ionization energies as one moves across the fourth period from K to Kr? How does this trend compare with the trend in atomic radii?
When taking a boiling point of a compound, why is the micro boiling point determined at the point when the last bubble has left the bottom of the bell and the liquid begins to rise in the bell
(ii) calculate the density of the material,given that its atomic weight is 141g/mol.(b) Molybdenum (Mo) has a Bcc crystal structure,an atomic radius of 0.1363nm and an atomic weight of 95.94g/mol. compute its theoretical density.
Suppose you had started with 3.25 moles of sodium hydrogen carbonate,how many moles of sodium chloride would you expect to be formed?
State the compositions and relative proportions of the two phases present after a solution initially 0.300 1-butanol is heated to 393.94 K
If cadmium metal and the Fe(III) ion are mixed in aqueous solution, a solution containing Cd(II) and Fe(II) results. The balanced equation for this process is
Devise cells to study the following biochemically important reactions. In each case state the value for v to use in the Nernst equation.
Reaction with a secondary base (piperidine) as well as with diethyl malonate, and that this reaction proceeds as if it was done with a tertiary base
The heat of vaporization of liquid water is 40.67 kJ/mol, and the molar heat capacity is 75.3 J/ (K x mol) for the liquid and 33.6 J/ (K x mol) for the vapor.
Calculate the mass of Sodium Nitrate required to prepare 50cm3 of 0.2 moll-1 solution
Problem- Butanal (molecular weight=72) has a boiling point of 76 degrees Celsius while 1-butanol (molecular weight=74) has a boiling point 118 Celsius. What accounts for this difference in boiling points
What conformational relationship between the Cl and F atoms in 1-chloro-2-fluoroethane will result in the greatest molecular dipole moment
Presume you have 100 mg of a sample dissolved in 0.6mL of water. The partition coefficient for the compound in water and ether is 4.0. Compute how much total compound you would obtain with 3x0.2mL extractions with ether.
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