Imagine that you want to analyze a sample of aspirin by TLC- with a mo (1).docx

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Imagine that you want to analyze a sample of aspirin by TLC, with a mobile phase of 10:90 ethyl acetate:hexanes. In order to prepare your sample to be spotted on the TLC plate you decide to dissolve your sample in 100% ethyl acetate (assume that it is completely soluble). In two sentences or less explain if this is an acceptable way to prepare your sample in order to be â€œspottedâ€ on the TLC plate (assume the concentration is correct). please explain correctly Solution When spotting on TLC you should dissolve your compound in a suitable solvent. If you have a solid sample and you place on TLC it will not get spotted on TLC. If you have a liquid sample and you spot on TLC it will be too concentrated spot and while developing the TLC, you will observe a borad peak, which will be difficult to analyase. Hence, you should have to have a minimum dilute solution of your compound which need to be spotted on TLC. After spotting on TLC and after few minutes, the compound will get absorbed on TLC and the solvent will evaporate. .

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In a symmetric multiprocessor configuration: AH processors can perform the same copy a program at the same time AH processors can perform the same types of functions Each processor has its own OS Each processor has its own set of I/O devises In SMP OS: Any processor may perform scheduling Only Master processor may perform scheduling Memory and process management must be done by different processors I/O management is a function of a special dedicated processor We can say that multiprocessor OS supports fault tolerance if: The operating system \'does not pay attention \" to the HW failure of a single processor The operating system controls only error signals from the external devices The operating system provides graceful degradation in the face of processor failure. The operating systems reacts only on error messages from the user programs HW-based cache coherence solutions used to recognize: The dynamic recognition at run time of potential inconsistency conditions HW errors in the cache Duplication of the data item in the cache The correct execution of the write operation in the cache What is wrong? The duster Is: A group of interconnected whole computers working together as a unified computing resource A group of separate computers used to solve one big task The alternative to SMP as an approach to providing high performance The alternative to SMP as an approach to providing high availability 20. If in multiprocessor system access time for a processor differs depending on which region of main memory is being accessed, we call memory access: Solution Answers: 15) 1 16) 1 17) 3 18) 1 19) 2 20) 4 .

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In consumer behavior we discussed innovators, opinion leaders, and market mavens who may have an influence over our purchase decisions. There is a similar concept discussed for organizational buyer behavior. Describe the concept and how it relates to the CB concepts. Solution In consumer behavior we discussed innovators, opinion leaders, and market mavens who may have an influence over our purchase decisions. There is a similar concept discussed for organizational buyer behavior. Describe the concept and how it relates to the CB concepts. In consumer behavior, the main entities that can influence the purchase decision of a consumer are: 1) innovators are the one who are basically risk takers. The main attribute of them are the fact that they are able to absorb the financial cost as well as the social cost of adopting the unsuccessful products. They are the one who extensively use commercial media, cosmopolitan in their outlook, uses professional source for getting information, etc. 2) Market mavens are the individuals who provide wide amount of information about the different kinds of products and services. They basically foster information related to product quality, features, availability, price and sales. Extroverted, conscientious, and extensive use of media are some of the main characteristics of market mavens. 3) Opinion leaders are the one who basically provides information about a particular product or activities. They are having more status than that of their followers and are socially active (Hawkins, Mothersbaugh and Best, 2012). In contrast to innovators, opinion leaders and market mavens that may affect consumer purchase decision are buying center that affects the organizations .

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In chapter 2, 5 objectives of memory management were discussed. In Chapter 7 the 5 requirements are discussed. How does each Chapter 2 objective match to a Chapter 7 requirement? Solution After studying chapter 7 learning objectives, you should be able to: Memory management is intended to satisfy the following requirements: Relocation : Programmers typically do not know in advance which other programs will be resident in main memory at the time of execution of their program. Protection: Processes need to acquire permission to reference memory locations for reading or writing purposes. Sharing: Advantageous to allow each process access to the same copy of the program rather than have their own separate copy. Logical organization: Physical organization: Memory available for a program plus its data may be insufficient and overlying allows various modules to be assigned the same region of memory but is time consuming to program. .

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In certain chlorophyll cofactors the Mg2+ is axially coordinated by the S-atom of a methionine. This is odd considering that Mg2+ is considered to be a â€œhard acidâ€ cation. Why would water molecules be a more natural choice for coordination to the Mg2+ than sulfur? What is it then about this protein and its structure that makes the Mg-S coordination happen? Solution Mg 2+ is the bound central metal ion in chlorophyll which is the major photosynthetic pigment.In chlorophyll Mg 2+ is chelated equatorially by tetrapyrrolic macrocycle.One of the two axial position is occupied mainly by histidine residue and other by O-donors,N-donors or S atom. According to Pearson classification Mg 2+belongs to hard ions and it\'s ionic radius is relatively small.It forms stable complexes with O- donors like H2O while less stable complexes with N donors or S atom.Since water is a polar molecule and is electron rich and also the distance between Mg 2+ and water is found to be 2.06 AÂ° which is smaller compared to the others. Also the water and Mg bond is electrostatic in nature.All this makes water and Mg 2+ coordination more stronger and preferred over S atom. S is also being an electron rich ..it can also form bond with Mg 2+. These has been explained on the basis of Density functional theory which gives the distance between Mg 2+ and Water and S atom. .

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In c, Topic pointers Why do they call it dereferencing? As in dereferencing the pointer. Where does that name come from? In c, Topic pointers Why do they call it dereferencing? As in dereferencing the pointer. Where does that name come from? Topic pointers Why do they call it dereferencing? As in dereferencing the pointer. Where does that name come from? Solution a.) A pointer is a variable that consists the address in memory of another variable. The deference of a pointer gives the contents of an object pointed to by the pointer. b.) Through this we are accessing a variable indirectly. De- prefix mostly comes from the latin preposition meaning from. Dereferencing takes asway the reference and gives us what we are actually referring to. c.) The unary operator * is the dereferecing operator ,which helps in accessing the object the pointer points to. d.) Example: typedefÂ Â struct X{int i_; double d_;} X; XÂ Â Â x; X*Â Â p= &x; p->d_=3.15576;Â Â Â Â // dereferencing and accessing the data member x.d_ (*p).d_*=-1; .

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In C++ a function used to put data into a stack is typically called a what? Solution Push function used to put data into a stack A Stack is a data structure which works on the principle LIFO(Last In, First Out).The basic operations in a Stack are : 1. Push : In which we push the data into the stack. 2. Pop : In which we remove an element from the Stack. All insertions and removals are done only from one side of the Stack , which is called the \'top\' of the Stack. A stack is generally used in function calls where the local variables are pushed onto the Stack and when the function returns , it pops the variables from the Stack. // Push operation to insert an element on top of stack. void Push(int x) { if(top == MAX_SIZE -1) { // overflow case. cout<<\"Error: stack overflow\ \"; return; } A[++top] = x; } .

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In C Programming create a program that converts a number from decimal to binary. You must use a stack to complete this assignment. â€¢ Void pop() â€¢ Void push(int data) â€¢ Int top() â€¢ Int isEmpty() You must create an implementation of a stack. You may use either an array or a linked list as the underlying structure. You will, at a minimum, need to implement the following stack functions: Your program should take decimal input from the user, and convert it to binary, and simply print it out. Solution normal program #include<stdio.h> int main(){ long int decimalNumber,remainder,quotient; int binaryNumber[100],i=1,j; printf(\"Enter any decimal number: \"); scanf(\"%ld\",&decimalNumber); quotient = decimalNumber; while(quotient!=0){ binaryNumber[i++]= quotient % 2; quotient = quotient / 2; } printf(\"Equivalent binary value of decimal number %d: \",decimalNumber); for(j = i -1 ;j> 0;j--) printf(\"%d\",binaryNumber[j]); return 0; } using stack .

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In an alternative universe, all rules governing quantum numbers and the periodic table are exactly the same as our universe EXCEPT that m l = 0 --> l + 2 (due to font issues: zero to the letter L plus 2) Answer the following: What changes are made to the appearance of the periodic table (how have the s, p, d and f blocks changed and what does that do to the table)? What is the 2nd noble gas in the alternate universe? Solution Answer - M l = 0 to l+2 for n=1 ; l= n-1 = 0; M l =0 to l+2 = 0,1,2 Hence there is 3 subshell in s orbital which occupy 6 electron. in the same way; for n=2 l=2-1=1 M l = 0 to l+2 = 0,1,2,3 p-orbital occupy 8 electrons. n=3 l=2 M l = 0 to l+2 = 0.1.2.3.4 d have 10 electron. n=4 l=3 M l = 0 to l+2 = 0,1,2,3,4,5 f occupy 12 electron Second noble gas = 6(1s) +6(2s) +8(2p) =20th element is second noble gas = which is calcium, Ca .

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In 2007, Heuy\'s actual income was $70,000, equal to his lifetime annual average; Dewey\'s actual income was $50,000, $10,000 below his lifetime annual average; and Louie Solution H ello Pal, F irst of all a very nice as well as intersting question from your side. S o now straight to the question, as asked above with all the information available from your side and from mine, the answer is as under: A fter calculation of the above given information, we can conclude that the answer will be as under: Huey: 6.50% Dewey: 5.24% Louie: 7.28% T hat is all I can say from the above given information by you, hope have solved your problem to some extent. R egards. .

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Im creating a stack class using generics. what should my peek method look like ? I\'m just using a simple peek method, here\'s what i have thus far public class stack<T> { private ArrayList<T> stack = new ArrayList<T> (); private int top = 0; public int size () { return top; } public void push (T item) { stack.add (top++, item); } public T pop () { return stack.remove (--top); } public T peek() { } public Boolean isEmpty() { if (top == -1) return true; else return false; } } Solution Hi, I have updated peek() methd. Highlighted code changes. public class stack<T> { private ArrayList<T> stack = new ArrayList<T> (); private int top = 0; public int size () { return top; } public void push (T item) { stack.add (top++, item); } public T pop () { return stack.remove (--top); } public T peek() { if (isEmpty()) { throw new EmptyStackException(); } return stack.get(top); } public Boolean isEmpty() { if (top == -1) return true; else return false; } } .

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ii)State whether you would expect the following Group 13 metal cations to act as Lewis acids or bases. Order the cations in terms of softest to hardest. Explain your answer. Al3+, Tl3+, Ga3+, Tl+ (iii) State whether you would expect the following Group 15 hydrides to act as Lewis acids or bases. Order the hydrides in terms of softest to hardest. Explain your answer. PH3, NH3, AsH3 Solution ii) The given group 13 metal cations will act as a Lewis acids , because cations are are electron deficient and act as a electron acceptor. Hard Acids are Lewis acid which are small in size and most likely are the light metal cation with high positive oxidation state like Al 3+ Soft Acids are Lewis acid which are larger in size and most likely are the heavy metal cation associated with low oxidation state like Tl 3+ Tl + Oder of cation from softest to hardest Â Â Tl + < Tl 3+ < Al 3+ (iii) The given Group 15 hydrides will acts as Lewis Base, because Nitrogen, Phosphorus and Arsenic has a lone pair of electron that it can donate. Hard Base are Lewis base anions or neutral molecules which are not easily polarizable like NH 3 Soft Base are Lewis base anions or neutral molecules which are easily polarizable like PH 3 and AsH 3 Order the hydrides in terms of softest to hardest AsH 3 < PH 3 <NH 3 .

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IMF in Greece. Good or bad for the country? Why? Solution IMF is international monetary fund.It was established with the motive of promoting international monetary cooperation.It is good because: 1. It helps in abolishing the exchange restrictions among member nations. 2. It helps in maintaining balanced economic development of the member nations by poviding them monetary help. 3. It helps the member countries in making investment in profitable projects. 4. It offers monetary help to member countries in correcting the disequilibrium of balance of payment. IMF is bad because: 1. it is a club of rich countries only. it discriminate between rich and poor memebers. 2. it do not provides loan for developmental projects. it only gives loans for maintaining the favourable balance of payment. 3. it interferes in the domestic economies of member countries. while providing loan to member counties IMF put many restrictions. 4. IMF tried to maintain stability in price of gold but failed in achieving this aim. .

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