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Explain why the first ionization energy of transition elements are of similar? Why does lithium have a much lower first ionization than helium? Arrange the atoms of Cs,Mg,N and F in order of increasing:
a) electronegativity
b) atomic size
c) ionization energy
Calculate the solubility-product constant for PbCrO4. Ksp = (c) The Ksp of Tl2S at 25 oC is 6.00e-22. What is the molar solubility of Tl2S? solubility = mol/L
If you have 100 ml of pure water and add to it 10 ml of 2.0M HNO3, what will be the pH of the final solution
The strongest line in the visible region of the neon spectrum has a wavelength of 640.2 nm. What color does the light appear. What is the energy of a photon associated with this line.
Given: NaOh 0.108 M HCl 7.80 mL calculate the molar amount of NaOH used in titration HCl
The temp of both solutions before mixing was 23.0 degree celsius, and its rises to 34.8 degree celsius after the acid-base reaction. What is the enthalpy change for the reaction per mole of NaOH
A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0- L vessel at 300 K . The following equilibrium is established:
Draw the major condensation product obtained by treatment of cycloheptanone with sodium ethoxide in ethanol.
What is a major component of the solvent used in paper chromatography?
One way to recrystallize a solute from a solution is to change the temperature. Another way is to evaporate solvent from the solution. A 340 g sample of a saturated solution of KNO3 in water is prepared at 25.0.
Define an attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. Suppose the mixture had an observed specific rotation of 16.5°. If it is known that the specific rotation of the R enantiomer is -31.1°..
Freon 11 was a favored refrigerant until it was determined to be detrimental to the atmospheric ozone layer. The heat of vaporization of CCl3F liquid is 25.2 kJ/mol and its normal boiling point is 24.0 C. Approximate the entropy of vaporization ..
how many g of A will be transferred to the new ether layer? (K remains the same, even though the number of g of A being partitioned is smaller. How many total g of A have been extracted into the two ether fractions?
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