Dielectric Constant of a Solution of Polar Molecules
An alternating electric field of frequency w has an electric field, E = Ec, exp(iɷτ), which varies with time τ (“tau”). Applying an alternating field…
Chemistry
X-Ray Crystallography Structure Factors
X-ray diffraction is a standard method of chemical analysis to determine the structure of crystalline solids. The X-rays photons are scattered from the electrons in…
Particle in A One-Dimensional Box
Quantum effects are dominant in many areas of Chemistry and Biology. A simple system that shows how quantum effects arise is the particle in a…
Chemical Bond Variations
Chemists use infra red spectroscopy (IR) which relies on the vibrations of chemical bonds to identify particular “functional groups” in an organic or inorganic compound…
Explain de Moivre’s Formula?
Multiplying the polar form of the complex number: z =|z| (cos Ө + i sin Ө) by itself n times then we multiply the size |z| by itself…
Atomic Orbitals
The wavefunctions for the 2px and 2py atomic orbitals for the H-atom can be written as, Notice that the 2px and 2py atomic orbitals only…
Quantum Chemistry
Question: In the quantum mechanics of electrons, atoms, molecules, or ions; chemists make use of wavefunctions ψ. The reason is that the value of the…
Why use Imaginary numbers and Complex Numbers?
Here giving a longer than normal introduction to imaginary and complex numbers because as a student I couldn’t see why some lecturers and professors wanted…
What is Enzyme Reaction Kinetics?
The rates of enzyme reactions literally determine our health and well-being, it is extremely important both personally and industrially (the pharmaceutical industry). Adenosine triphosphate (ATP)…
Ionization of He
Question: Above Figure shows a stainless steel source of a mass spectrometer which is inside a vacuum chamber at a pressure of about 10-10 atm.…
Load More