In: Chemistry
Are the number of lone pairs of electrons on the central atoms the main factor that's used to determine the molecular shape or geometry?
In: Chemistry
Explain the significance of correlating the microscopic findings with the physical and chemical urinalysis results.
In: Chemistry
What is the definition of an oxidation/reduction reaction? Write down three chemical equations for this type of reaction that occurs in a natural process. Indicate their chemical valences before and after a reaction and point out which chemical species is an oxidant or a reductant in the chemical reaction.
In: Chemistry
Calculate the frequency of the light emitted when an electron in a hydrogen atom makes each of the following transitions. Express in inverse seconds.
a) n=4?n=3
b) n=5?n=1
c) n=5?n=4
d) n=6?n=5
In: Chemistry
In: Chemistry
What is the strongest interparticle force in each of the five compounds: KMnO4, sucrose, Iodine, NiSO4 6H2O, naphthalene? What relationship exists between the IMF and the solubilities?
In: Chemistry
What are the relative pKas of strong electrophiles vs. strong nucleophiles? Please explain the difference between electrophiles and nucleophiles.
In: Chemistry
For an incident gamma-ray interacting with an inorganic scintillator, describe the interaction of the gamma-ray, how scintillation light is generated, how it is converted into an electrical signal, and how it is amplified.
In: Chemistry
write orbital diagram for each ion and determine if the ion is diamagnetic or paramagnetic.
a. Cd2+ b.Au+ c.Mo3+ d. Zr2+
Provide your answer: example :paramagnetic, diamagnetic, etc., accordingly to a, b, c,and d.
In: Chemistry
In: Chemistry
The equilibrium constant (Ka) for benzoic acid is 6.46 x 10^-5.
Calculate the ratio of benzoic acid to benzoate ion in solution pH=2.00. Then calculate the same ratio at pH=4.00.
In: Chemistry
A 280.0mL buffer solution is 0.220M in acetic acid and 0.220M in sodium acetate.
A. What is the initial pH of this solution?
B. What is the pH after addition of 0.0050mol of HCl?
C. What is the pH after addition of 0.0050mol of NaOH?
In: Chemistry
What element is being oxidized in the following type of reaction 4 PBr3 (l) > P4 (s) + 6 Br2 (l)?
A. P or Br
In: Chemistry
How to draw syndiotactic triad of poly(methyl methacrylate) and benzoyl peroxide initiator?
In: Chemistry