An excited electron in an Na atom emits radiation at a wavelength 589 nm and returns to the ground state. If the mean time for the transition is about 20 ns, calculate the inherent width in the emission line. Note that the uncertainty principle can be expressed as ApAx and ATAE.

Q: How do you get a long strand of nylon? What is the key to it?

A: Long strand of nylon can be formed by the condensation polyemerization.

Q: Draw the products of the two step reaction sequence shown below. Use dash and/or wedge bonds to…

A: The given reaction is Sn i ( substitution nucleophilic intramolecular) in presence of base sach as…

Q: Provide a table with molecular weights, boiling points, and density values for the starting material…

A:

Q: The monomers NH2 and HO-C (CH FOH would react with each other to form a polyamide a polycarbonate a…

A:

Q: Wifich of the following, when mixed with water, should be disposed of in a basic aqueous waste…

A:

Q: liquid chloroform density diethylamine 0.71 acetone 1.5 ethanolamine 1.0 pentane 0.79 0.63 g mL g mL…

A: We can calculate the density of a substance by using its mass and volume.We will calculate the…

Q: Draw a tetramer of this alternating copolymer. HO CI + CI 19 OH Q Q

A: Question

Q: Cd(s) + MgBr2(aq) →

A: This is single displacement reaction . Reaction in which one atom replace by another atom

Q: All chemical dangers in the workplace are addressed under the:   A)  Formaldehyde Standard   B)…

A: Almost all chemical compounds are injurious to human beings as they can be either corrosive or…

Q: As the airstream is cooled, the new-point temperature... and the absolute humidity. 00 1- Increase,…

A: Answer - The correct option is (2) Remains the same , remains the same Explanation - According to…

Q: Review the following ingredient list for a kombucha product: Raw kombucha (sparkling water, wild…

A: To list and state the functional property of each sugar and sweetener ingredient within the context…

Q: Define selective functionalisation

A: Sometimes it is essential to form a perticular isomer of any chemical compound for there medicinal…

Q: Which of the following would you expect to be hydrophilic? A) The interior of a cell membrane B) A…

A: Hydrophilic species are water-loving species. Phospholipids are the polar lipids that comprises of…

Q: write the TOPAC Name of each compound. (a) (b) (c)

A: Since,Rule of IUPAC-1) Longest chain as parent chain.2) Numbering start from those side where more…

Q: Similarities and differences between aspirin C9H804 and Methyl chavicol (estragole) C10H120 ?

A: The question asked for a comparison between two compounds, Aspirin and Methyl chavicol (Estragole),…

Q: `NH H20 HO, of

A:

Q: OH باد للہ م

A: Diethyl malonate, also known as DEM, is the diethyl ester of malonic acid. It is used for synthesis…

Q: Identify the compound and give its use/indications.

A: We have the following given compound:

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.