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

Q: Balance stoichiometry water react with tallow

A: Tallow is the solid fatty substance obtained from milk of  animals or direct from animals like goat…

Q: Different polymers have different properties. Explain

A: Polymer is a big molecule or macromolecule which is essentially a combination of many subunits.…

Q: a) What is the chemicals in plastic and what are the physical and chemical properties of it.

A: Chemicals of plastics In the case of plastic bags, the repeating units are ethylene, or ethene. When…

Q: Describe Werner’s Theory?

A:

Q: Differentiate malleability and ductility of metals.

A: Malleability is a property of metal,by which they can be beaten into thin sheets without breaking.…

Q: Classify stainless steel according to type of matter

A: Stainless steels are classified according to their metallurgical structure :- (a) austenitic, (b)…

Q: An introduction to atoms and molecules and link them with polymers

A: Atom- A variety of matter is present in the surrounding. When these matters are broken down into…

Q: 2. This steel is used in railway wheels and tracks, gears, and crankshafts. * O High carbon steel O…

A:

Q: Q.A16 Which TWO of the following properties are generally HIGHER for steel when compared with…

A: Note: According to our guidelines we are supposed to answer only one question.  Kindly repost other…

Q: In four or more sentences, explain the advantages of using biodegradable plastic

A: Answer - Biodegradable plastic - Biodegradable plastics are plastics that can be decomposed by the…

Q: Question 17 What happens to the result of a thick sample subjected to Micro X-ray Fluorescence?…

A: Xray fluroscene is a analytical technique where sample with small sample areas is to be analysed.…

Q: Why nanotechnology research and development of application is important?

A: Nanotechnology research and development of application is very important now as well as in future.

Q: What are the main factors that determine the electrical resistance of a formation?

A: Solution:  The main factors which determine the electrical resistance of formation are mentioned…

Q: Define the process nomenclature.

A: INTRODUCTION: Particular term has been defined for choosing name of different compound in the field…

Q: What protections does fire resistance not provide?

A: Fire resistance is defined as a type of chemical/coating which is applied while making houses and…

Q: Differentiate between Polymers and Plastics? Give some examples?

A: The word polymer is the combination of two units : 'poly' and 'mers' where 'poly' means many and…

Q: Identify 3 composite materials that uses metallic bonding.

A: A material produced from two or more constituent materials with different properties and without…

Q: Describe polymers. Give five examples and cite their uses.

A: Polymers have been the choice of raw material for many products these days. The polymer industry is…

Q: In one to two sentences, explain why metal is often used for making wire and the properties that…

A: Metals are a group of elements that are typically solid, shiny, and good conductors of heat and…

Q: Metals, semiconductors, and insulators are distinguished by differences in values, A) conductivity B…

A: Metals are very good conductors of electricity. Insulators are poor conductors of electricity.…

Q: Which of the following instruments is based on the interactions between a soft cantilever spring…

A: Cantilever is having a sharp tip which scan the sample surface.

Q: . You found a weird ceramic material on the street and wonders if it might be ok to use in a medical…

A:

Q: Give an example of an ethical dilemma that can occur in nanotechnology research. Discuss why it is…

A: Nanotechnology is the study of special properties of particles having size in the range 1 - 100…

Q: fire and explosion risks in a chemistry laborotory

A:

Q: Nanomaterials provide various applications that can benefit humans. Are there possible disadvantages…

A: As we know that Nanomaterials are very useful for humans , these are useful in different forms as a…

Q: Mn + CuCl Cu + MnCl,

A: 1. Answer :----- The given reaction are :---- ____Mn + _____CuCl ---> ____Cu + ____ MnCl2 Here,…

Q: What is chaotic and unclean the vulcanizing

A:

Q: Make an analysis about this table LIQUID DISTANCE TIME COOKING OIL 45 CM 20.47

A:

Q: How do the properties of polymers compare with those of metals?

A:

Q: It is one question asking for two starting materials

A: The starting material can be given as :

Q: Refer

A: Geothermal energy is heat within the earth. The word geothermal comes from the Greek words geo…

Q: What the benefits of EDTA in industry, chemistry or medicine.

A: EDTA stands for Ethylene-diamine-tetraacetic-acid. It is actually an carboxylic acid with amine…

Q: Could we have used other materials instead of copper and zinc plates ? If so, list 2 other materials…

A: The question is asking if there are alternative materials that could be used in place of copper and…

Q: How can tungsten be conserved if it accidentally becomes contaminated?

A: Allowing the tungsten to touch the weld pool is one of the most common causes of contamination. This…

Q: Using the tensile test simulation tool (in the folder 7: Mechanical Properties of Metals), a.…

A: (a) (b) Proportional Limit (Hooke's Law): From the origin O to the point called proportional limit,…

Q: Differentiate between thermoplastic and thermosetting polymers. Give one example of each.

A: Thermoplastic polymers =  Thermoplastic polymers are those which can be softened, reshaped at…

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.