What is heartburn and when does it occur? Heartburn occurs when hydrochloric acid‚ which is used to digest food in the stomach‚ backs up into the oesophagus causing an irritation. Normally the oesophageal sphincter would close tightly‚ not allowing the acid to back up. If this valve‚ however‚ is not functioning‚ the acid can slip by. Occasionally heartburn can be associated with hiatus hernias. Describe how the heart remedy works‚ including a description of what a neutralisation reaction is
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developed ways to classify matter. • The properties of materials can be used to classify them into general categories. – Ex: Pure substances‚ elements‚ compounds‚ mixtures‚ etc. • Materials are made of a pure substance or a mixture of substances. – Substance: A type of matter with a fixed composition. • A substance can either be an element or a compound. – Ex: Helium‚ Aluminum‚ Water‚ Salt‚ etc. • Elements are built from atoms. – Atom: The smallest particle of an element that still retains the properties
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Management Science-II Prof. R.Madumathi MODULE 2 Finance – An Introduction The functions of finance in an organization is interlinked with other managerial responsibilities and in many instances‚ the finance manager could also done the role of a managing director. For the smooth functioning as well as to achieve excellence‚ organizations have to concentrate on the financial impact of a decision and its consequences. This also helps the organization to aim at a desired competency level against
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annuity that begins at the end of the third year and continues until the end of the tenth year‚ given a 12% discount rate. a. $4‚811 b. $3‚248 c. $4‚734 d. $5‚650 e. $3‚960 4. Which of the following statements is most correct? a. An investment which compounds interest semiannually‚ and has a nominal rate of 10 percent‚ will have an effective rate less than 10 percent. b. The present value of a three-year $100 annuity due is less than the present value of a three-year $100 ordinary annuity. c. The proportion
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are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation‚ you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf‚ which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment. Rf = Ds/Df Ds = Distance traveled by the compound Df = Distance traveled by
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in a heterogeneous mixture distillation: liquid is boiled to produce a vapor that is condensed into a liquid i.e.: separating water from other components in tap water 2.3 element simplest for mof matter that has a unique set of properties compound: subsgtance that contains two or more elements chemically combined in a fixed proportion chemical change: change that produces matter with a different composition than the original matter chemical symbol: each element represented by a one or
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The aim of this Lab Exercise is to use the mass of a chemical and use that mass to find the amount of moles of the final product you can get using the empirical formula. Introduction: The empirical formula of a compound is the simplest whole-number ratio of the elements in the compound‚ which as you will discover‚ is a ratio of the moles of those elements. “Empirical” also means “experimentally determined”. In this experiment‚ we find the empirical formula of the oxide of magnesium. We will accomplish
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Verb Dehumanize means to deprive of human qualities or attributes; divest of individuality. Etymology- De (not) + humanize (to make human) Dehydrate- Verb Dehydrate means to deprive (a chemical compound) of water or the elements of water. Etymology- De (not) + hydrate (presence of water in a compound or living object) Defrost- verb Defrost means to remove the frost or ice from an object. To melt an object from ice or frost to a liquid form. Etymology- De (undo) + frost (to freeze an object) Deescalate
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A scientist separated a mixture to obtain the specific substance that was in need. Many of the compounds and mixtures today are not found in its pure form‚ but in mixtures. Many scientists have the impression that separating mixtures is an important part of chemistry and modern academics. How can the components of mixture be separated and analyzed? Background Information: All elements and compounds are pure substances and they are categorized by having specific properties that are unique from other
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concentrations of the other major components of Red Bull and Sugar Free Red Bull were not obtained because analysis of those compounds required a higher degree of expertise than can be offered for this lab and will be identified by process of comparison‚ elimination and two dimensional spectral analysis where both protons and carbon 13 are examined to identify and quantify a compound that does not show up on a one dimensional NMR spectrum. This experiment will allow students to gain a better understanding
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