Explain the technique used in Flame-AAS that will prevent loss of sens (1).docx

•Descargar como DOCX, PDF•

0 recomendaciones•2 vistas

Explain the technique used in Flame-AAS that will prevent loss of sensitivity of analyte through ionization. (e) (3 marks) Solution In flame AAS ( Atomic Absorption Spectroscopy) the sample is ionised by heating by source of flame and the atoms of the sample gets converted into gaseous ground state which absorbs energy (light) of a particular wavelength from source of light and the amount of light absorbed tells about the concentration of the metal in the sample . A nebulizer is used to spray the gaseous atoms (vapour) of the metal . The source of light (hollow cathode lamp ) is most specific one and made up of the same metal which is to be analysed ang highly specific and thus maintain the sensitivity of the technique. .

Educación

Más contenido relacionado

Más de rtodd432

Explain the reasons why chloride ions (Cl-) is detrimental to corrosion of various metals. Solution Corrosion of metals can be defined as the degradation of quality or quantity of metals by the attacking of atmospheric gases or other radicals to form unwanted products. From the difinition metallic nature, metals have a tendency to lose electrons and become positively charged ions at the surface level and these positive charged species attracts negative chloride ions and undergo reaction to form undesired metal chlorides. M ----------> M+ + e- M+ + Cl- -----------> metal chloride ( undesired product ) Chloride ion being highly reactive it can react with various metals and so its is detrimental to corrosion of various metals. .

Explain the reasons why chloride ions (Cl-) is detrimental to corrosio.docx

rtodd432

Explain the purpose of a data member. Solution Answer Data Member It is nothing but an object may contain values which are stored internally and are unique to that object. A data member may be any type. Including Classes already defined, references of object any type. We need to declare a data member in the classs. that is like in C++ we can write like in private , public blocks private : int sum; ------ ------ public : int a; float value; ----- ----- In java we can write as int a,b,c; int sum=30,value=40; .

Explain the purpose of a data member-SolutionAnswer Data Member It is.docx

rtodd432

Explain the function of the following methods in LinkedList 1. addFirst(E e) 2. contains(E e) 3. get(int index) 4. i ndexOf(E e) 5. remove() 6. remove(int index) 7. set(int index, E e) Solution 1. addFirst(E e): It adds an element e at head of linked list 2. contains(E e): It searches element e in list. If it is in list, it returs true otherwise false 3. get(int index): this return element at index \'index\' 4. indexOf(E e): this return index of element e in list if it is in list. Otherwise it return -1 5. remove() it removes last element from list 6. remove(int index) it delete element at index \'index\' 7. set(int index, E e): it replaces element at index \'index\' with element e .

Explain the function of the following methods in LinkedList 1- addFirs.docx

rtodd432

Explain the motivation behind using a header file for a C program. Solution A header file is a file containing C declarations and macro definitions to be shared between several source files. Header files purpose: System header files declare the interfaces to parts of the operating system. these will provide the definitions and declarations you need to invoke system calls and libraries. Your own header files contain declarations for interfaces between the source files of your program. Each time you have a group of related declarations and macro definitions all or most of which are needed in several different source files, it is a good idea to create a header file for them. Including a header file is equal to copying the content of the header file .

Explain the motivation behind using a header file for a C program-Solu.docx

rtodd432

Explain the effect doping towards an intrinsic silicon. Give one example of donor element and one example of acceptor element. [15 marks] Solution Silicon is an intrinsic semiconductor. The doping is done to introduce impurities into an intrinsic semiconductor for modulating its electrical properties. A semiconductor doped to a very high level can act as a conductor and is generally referred to as degenerate semiconductor There can be two types of impurities ie., donor type and acceptor type. Donor type are n-type semi conductors which will increase the number of unpaired electrons. An example of this is Phosphorus or Arsenic, Antimony, Bismuth Acceptor type are p-type which will increase the number of holes or hole concentration. Examples are Aluminum, Gallium, Boron, Indium. .

Explain the effect doping towards an intrinsic silicon- Give one examp.docx

rtodd432

Explain the difference between private and proctected members of a class. Solution Hi, I am explaning difference between private and public in context of Java Programing Language(since you have not mentioned any Programing Language). private : Members marked private can not be accessed by code in any class other than the class in which the priavte member was declared. - A private member is invisible to any code outside the member\'s own class. - When a member(function) is declared private, a subclass can not inherit it. protected :Â Â Members marked protected can be accessed by a subclass(child class) even if the subclass is in a different package. .

Explain the difference between private and proctected members of a cla.docx

rtodd432

Explain how goverment deficit lead to increases in the money supply? Explain how goverment deficit lead to increases in the money supply? Solution Government deficit is excess of government expenditure over government earnings (majorly from taxes), when a goverment deficit is financed through priniting of money, the huge amount of money enters into the economy from the reserve bank of the economy which leads to rise in the overall money supply. .

Explain how goverment deficit lead to increases in the money supply-.docx

rtodd432

Explain how doping Si allows you to transport charges in a detector. Solution Si is surrounded by four other Si atoms. Each Si shares one electron to the neighboring Si atom. A total of four electrons are shared by a single Si to its four neighbouring Si atoms. When Si is doped wih a pentavalent element, four of the electrons of the pentavalent element is shared with four neighbouring SI atoms. There is one electron from the pentavalent element which is free to move and conduct. When Si is doped with trivalent element, the three electrons are shared with three of the neighbouring Si atoms. There is no electron to share with the fourth Si atom. So, there is a hole. SInce the hole is electron deficient, it accepts electron somewhere else in the lattice resulting in creation of another hole. This shifting of the hole is responsible for conduction. .

Explain how doping Si allows you to transport charges in a detector-So.docx

rtodd432

Explain how an \"interest group\" (or \"special interest group\") may try to influence public policy made by departments and/or agencies Solution Interest Groups Functions of interest groups Activities Structures Legitimacy Problems of analysis and research BIBLIOGRAPHY Interaction between the polity and organized interests has taken place in all periods of history. Estates, guilds, trading companies, and the like are the more immediate antecedents of the modern interest group, which may be defined as a voluntary association of individuals who band together for the defense of an .

Explain how an --interest group-- (or --special interest group--) may.docx

rtodd432

Explain how stock price volatility is more likely to imply risk than earnings volatility. Solution Stock price volatility is more likely to imply risk than earnings volatility : Risk is the chance that some unfavorable event will occur but investment risk can be measured by the variability of the investmentâ€™s earnings. Generally, the term volatility is simply synonymous with risk. In public view high volatility is to be deplored because it means that security values are not dependable and the capital markets are not functioning as well as they should. Earnings comes as you invest, though sooner or later. It is the risk of occuring of show of earnings which is brought by volatility in the stock price. Earnings volatility does not necessarily imply investment risk. However, stock price volatility does signify risk. .

Explain how stock price volatility is more likely to imply risk than e.docx

rtodd432

Explain the concept entropy Explain the concept entropy Solution Answer- Entropy - Entropy is a measure of the randomness of a substances. In statistical mechanics, entropy is a measure of the number of ways in which a system may be arranged, often taken to be a measure of \"disorder\" (the higher the entropy , the higher the disorder). It is denoted by S, the entropy of substance and universe is calculated by appropriated formulas. deltaG =deltaH - Tdelta S .

Explain the concept entropy Explain the concept entropySolutionAnswe.docx

rtodd432

Explain how would you determine a covalent bond compoundâ€™s bond using Lewis rule. Solution Covalent bond is formed by mutual sharing of electrons from both elements. Normally elements that have small electronegative difference tend to form covalent bonds. Sometimes compounds that share electrons unequally are called polar compounds and the process is called polarity. An example of a polar compound is water (H 2 O).Each element satisfies newland\'s octet rule through sharing of electrons by which way the bond formed. Formal charge = (original number of valence electrons - actual number of electrons used in filling the octet). Only one electron is counted in a bond since bond formed by sharing of two electrons. Hope this helped you! Thank You So Much! Please Rate this answer as you wish.(\"Thumbs Up\") .

Explain how would you determine a covalent bond compounds bond using L.docx

rtodd432

Expansive (swelling) clays exist in various areas across North America. What kind of mineral is typically associated with the swelling condition? What is the explanation of the expansion? Identify some typical problems caused to civil engineering structure by expansive clays Solution Montomorrilonite mineral is typically associated with swelling soil.Because of larger surface area of these minerals water is attracted to the surface of these minerals.water enters in between the layers of the minerals of the soil forming a double layer of water around each mineral particles in the soil resulting in expansion of the soil. Typical problems caused by expansive soil to civil engineering structures 1) Differential settlement of the foundation. 2) Alternate swelling and shrinkage causes cracks in the walls of the buildings. 3) Expansive soil should be first stabililized for building any structure on it. .

Expansive (swelling) clays exist in various areas across North America.docx

rtodd432

FInd and invertible matrix U so that UR = R is in Reduced Row echelon form and express U as a product of elementry matrices for A =Â [1 2 1 5 12 -1] provide reduced row wchelon form R as well Solution A=[ 1 2 1 5 12 -1] multiply 1st row with 5 and subtract row 2 with row 1 =[ 1 2 1 0 2 -6] subtract row 1 with row 2 =[ 1 0 7 0 2 -6] divide row 2 with 2 and result is R R = [ 1 0 7 0 1 -3] UR=R (U-I)R = 0 U=I .

FInd and invertible matrix U so that UR - R is in Reduced Row echelon.docx

rtodd432

“Financial intermediaries play a crucial role in an economic crisis–they are responsible for both causing the market to crash and then helping it recover from the crisis.” Is this statement true? Discuss with an example. Solution yes ,“Financial intermediaries play a crucial role in an economic crisis–they are responsible for both causing the market to crash and then helping it recover from the crisis.” Financial intermediaries can be financial institution which plays as intermediaries between two persons as finance provider.Its role is to giving price information risk control regarding securities and share pooling of funds and distribute .

Financial intermediaries play a crucial role in an economic crisisthey.docx

rtodd432

Financial Institutions Describe each of the following financial institutions. If it is a financial intermediary, describe what type of liabilities it issues and who holds these liabilities, as well as what kinds of assets it holds and who issued these assets. If it is not a financial intermediary, describe the role of the institution in the financial system. . (a) Savings and Loans (b) Commercial Banks (c) Money Market Mutual Funds (d) Property and Casualty Insurance Companies (e) Pension Funds (f) Captive Finance Company No Copy and Paste please Solution I think that (f) Captive Finance Company .

Financial Institutions Describe each of the following financial instit.docx

rtodd432

Financial ratio analysis is conducted by managers, equity investors, long-term creditors, and short-term creditors. What is the primary emphasis of each of these groups in evaluating ratios? Solution Primary emphasis for Managers is the profitability ratios and turnover ratios to know and comment upon the profitability of the company for decision making process. For Equity Investors the primary emphasis is financial ratios to get an understanding of the financial position of the company to know whether to invest in the company or not. Long term creditors generally emphasize on the solvency ratios to know the debt repayment ability of the company. Short term creditors emphasise on the liquidity ratios of a firm because they are concerned about the day today working of the company which affects the firm\'s obligation to discharge its short term liabilities. .

Financial ratio analysis is conducted by managers- equity investors- l.docx

rtodd432

Files are logical units of information created by processes. A disk may contain millions of them. Does the operating system know or care what is in a file? yes, because it needs to maintain the files in a file system yes, because it needs to provide ways to store them on the disk and read them back later no, all the operating system sees is bytes; it regards files as nothing more than a byte sequence no, it relays file contents inspection to the antivirus user process (if any) Solution Second options is true . Because operating system needs to provide ways to store them on the disk and read them back later .

Files are logical units of information created by processes- A disk ma.docx

rtodd432

Fill in the blank Accurate determination of abundances of isotopes became possible with the development of the1)_______. These analyses have shown that some of the oldest rocks on Earth are 4.0 2) ______years old, with some meteorites dating even older than that. 1. A. nuclear fusion reaction B. hadron collider c. mass spectrometer d. Geiger counter 2. A. hundred B. trillion C. thousand D. million e. billion Solution Accurate determination of abundances of isotopes became possible with the development of the c. mass spectrometer. These analyses have shown that some of the oldest rocks on Earth are 4.0 e. billion years old, with some meteorites dating even older than that. .

Fill in the blank Accurate determination of abundances of isotopes bec.docx

rtodd432

Exercise 16-16 On January 1, 2012, Chang Corp. had 564,000 shares of common stock outstanding. During 2012, it had the following transactions that affected the Common Stock account. February 1 Issued 141,000 shares March 1 Issued a 20% stock dividend May 1 Acquired 115,000 shares of treasury stock June 1 Issued a 3-for-1 stock split October 1 Reissued 79,900 shares of treasury stock (A) Determine the weighted-average number of shares outstanding as of December 31, 2012. The weighted-average number of shares outstanding Solution a) Dates Shares Fraction Weighted Event Outstanding Outstanding Restatement of Year Shares Beginning balance Jan. 1 .

Exercise 16-16 On January 1- 2012- Chang Corp- had 564-000 shares of c.docx

rtodd432

Más de rtodd432 (20)