Solving Basic Number Problems

MM7ord problems in algebra are problems that seem to take on a life of their own. You start out with a simple sentence in English and end up with an equation that, you hope, will answer the question that s been posed. 

In this chapter, you see how to use word clues to convert from English sentences to algebraic statements that can be solved and checked. The problems in this chapter aren t really themed — they re all over the place — but they show how to put algebra to its best use. 

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Most students of chemical nomenclature will agree that a broad general pattern which is capable of extension to diverse types of compounds is preferable to a number of specific patterns of limited extension. Inasmuch as most compounds of higher order can and should be looked upon as coordination compounds, coordination compounds encompass an extremely broad field. The development of a satisfactory scheme of nomenclature for these compounds may solve many nomenclature problems. If coordination compounds represent a fundamental pattern of chemical combination, there should be a sound basic plan for the nomenclature of this broad class of compounds. 

The method requires the student to solve a number of problems experimentally. To almost every one - especially children-experiments and chemistry are synonymous. Once an idea occurs to a chemist he immediately thinks in terms of ways of trying out his ideas to see if he is correct. Trying to confirm or disprove something, or simply to test an idea, is the backbone of the experiment. Experiments start with questions in order to find answers, solve problems, clarify ideas or just to see what happens. Experimenting should be part of the elementary school chemistry programme as an aid to helping children find solutions to chemistry problems as well as for helping them to develop appreciation for one of the basic tools of chemistry. 

Sodium silicates have found numerous applications in the oil industry, particularly in EOR chemical processes. The objective of this paper is to review these applications and relate them to the basic properties and reactions of sodium silicate, in order to develop a better understanding of how silicates are used to solve a number of interesting problems in oil recovery. 

In Eq. (1) and (2), there are more unknowns than the number of equations which is the basic closure problem. To overcome this difficulty, additional closure equations have to be added in order to solve it. 

Thin layer chromatography (TLC) is used in the pharmaceutical industry as a tool for quantitative and qualitative analysis of steroids the technique is useful for solving difficult analytical problems even in small laboratories equipped only with a basic setup. Although the use of high performance liquid chromatography (HPIX ) has increased rapidly in this field, and HPLC has superseded TLC for several applications, because of the simplicity and resolving power of TLC, it is sufficient to solve many analytical problems in steroid analysis. In the last decade many aspects of steroid analysis have been covered in a number of books, chapters, reviews and fundamental papers (1-8) these publications should be regarded as the basic source of informatitHi on this subject. 

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