acidification of salicylic acid and acetic anhydride. The objective was to convert a specific amount of salicylic acid into the same amount of aspirin that was high in purity. Furthermore‚ the other objectives were to enable students to conduct the synthesis of aspirin‚ reinforce skills or recrystallisation and the technique of melting point determination. The amount of each compound should be the same because there is a 1:1 ratio between them. The purity of the synthesized aspirin was measured by determining
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Linear Equations in Two Variables Exercise 3 Q1. Draw the graph of each of the following linear equation in two variables: (i) x + y = 4 (ii) x – y = 2 (iii) y = 3x (iv) 3 = 2x + y Sol. (i) The given equation is x + y = 4 y = 4 – x …………….equation (1) Now ‚ putting the value x = 0 in equation (1) y = 4 – 0 = 4. So the solution is (0‚ 4) Putting the value x = 1 in equation (1) y = 4 – 1 = 3. So the solution is (1‚ 3) Putting the value x = 2 in equation (1) y = 4 – 2 = 2. So the solution
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2.2 Solving Quadratic Equation A quadratic equation can be solved by using: 1. Factorization i) Arrange the unknowns in general form (ax2+bx+c=0) and factorize it 2. Completing the square i) x2-6x+4=0 ii) x2-6x=-4 iii) x2-6x+-622=-4+-622 iv) x2-6x+-32=-4+-32 v) x-32=5 vi) x-3=±5 vii) x=3±5 viii) x=3+5 OR 3-5 ix) x=5.236/0.7369 3. Quadratic formula x=-b±b2-4ac2a * Forming quadratic
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| Why Do People Hate Math? | | | | | | Why is it that people hate maths? Truly‚ there is no bona fide reason why mathematics in particular should be disliked. It forms an inevitable part of life that every human must confront at some time in their lives. Math‚ as defined by Wikipedia.org‚ is the study of quantity‚ structure‚ space and change. Without realizing it‚ people integrate simple math into their lives‚ whether it is by playing a card game‚ taking out a loan‚ checking
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Jesus Toro-Sanchez 03/13/2013 Math 60 Chapter 4 Writing Assignment 1) Explain how to plot a point in the rectangular coordinate system. Give example with your explanation. a. In order to plot a point in the coordinate system‚ you will need the X coordinate as well as the Y coordinate. For example‚ the point (3‚5) can be plotted be going right on the X axis 3 points‚ and going up on the Y axis 5 points. Remember the opposite goes for negatives. 2) How many Points are needed to graph
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Peter Mehnert Rhet 105 Ms. Paterson 11/14/12 Extended Synthesis: Cigarette Smoking Tobacco has played an important role in America from the beginning. It was grown as a cash crop by the Jamestown settlers in 1612‚ but over the years the popular opinion has changed about tobacco. Tobacco is used to make cigarettes‚ which have been extremely popular‚ now known to be extremely dangerous. Even the warnings on the cigarette box have changed to a statement much more alarming. In the 1960s‚ the warning
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FINANCIAL MATHEMATICS 1. RATE OF RETURN 2. SIMPLE INTEREST 3. COMPOUND INTEREST 4. MULTIPLE CASH FLOWS 5. ANNUITIES 6. LOAN REPAYMENT SCHEDULES Financial Math Support Materials Page 1 of 85 (1) RATE OF RETURN FINANCIAL MATHEMATICS CONCERNS THE ANALYSIS OF CASH FLOWS BETWEEN PARTIES TO A CONTRACT. IF MONEY IS BORROWED THERE IS AN INTIAL CASH INFLOW TO THE BORROWER BUT AFTERWARDS THERE WILL BE A CASH OUTFLOW IN THE FORM OF REPAYMENTS. A person
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A comparison of competitiveness of Chinese mobile phone manufacturers and foreign manufacturers in China Outline Introduction Methodology Analysis Conclusion References Introduction Purpose of this research 1.identify the competitive environment of mobile phone industry 2.find some suggestions for Chinese mobile phone manufacturers The reasons why i choose this topic 1.interest 2.mobile phone seems to be necessity goods Research questions 1.In the current competitive market‚ what is the position
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Company Perspectives: Our long history of strong performance comes from absolute focus on our core global businesses‚ combined with a successful worldwide financial strategy. This financial strategy is designed to increase gross profit margin and reduce costs in order to fund growth initiatives and generate greater profitability. Key Dates: 1806: Company is founded by William Colgate in New York to make starch‚ soap‚ and candles. 1857: After founder’s death‚ company becomes known as Colgate
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