and reactions Very Short Answer (1 marks each) Write the name and formula of compounds forms between a. Potassium and iodine ion .b.Sodium and sulphide ions . c. Aluminums and chloride ions 2. Why does milk sour when kept for a long time/ 3. What happen when hydrogen combine with oxygen in presence of electric current/ 4. Define electrolysis. 5. What is decomposition reaction? Give an example 6. Calcium oxide react with water to form calcium oxide. What
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that has the chemical characteristics of that element. -An element or an atom of that element often is represented by a symbol. -Usually the first letter or letters of the element’s name is/are used. For example‚ C for Carbon‚ O for Oxygen‚ H for Hydrogen‚ Ca for Calcium‚ Cl for Chlorine‚ K for Potassium and Fe for Iron. -The symbol is taken from English and Latin names. Atomic Structure: The characteristics of living and nonliving matter results from the Structure‚ Organization and behavior of
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water molecule consists of two hydrogen atoms and an oxygen atom‚ the oxygen atom has a partial negative charge‚ whereas the two hydrogen atoms have a slight positive charge. So‚ when water molecules are close together‚ their positive and negative regions are attracted to the oppositely-charged regions of nearby molecules‚ the attraction is called a hydrogen bond. Each water molecule can be hydrogen bonded to four others‚ because it can accept two and donate two hydrogen atoms. The fact that water is
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reacts with carbon dioxide to form sodium carbonate. c. Calcium metal reacts with water to form calcium hydroxide and hydrogen gas. d. Potassium nitrate decomposes to form potassium nitrite and oxygen. e. Barium metal reacts with Iron (III) sulfate to produce barium sulfate and iron metal. f. Barium chloride reacts with sodium sulfate to produce barium sulfate and sodium chloride. g. Bismuth (III) oxide and zinc metal react to produce zinc (II) oxide and bismuth metal. h. Calcium metal reacts
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trimethylamine is Lewis base. A curved arrow originates from nitrogen atom and point to hydrogen atom. The initial product of the acid-base reaction is trimethylnitronium chloride. In the below example number two‚ aluminum chloride is Lewis acid and dimethyl ether is Lewis base. A curved arrow originates from oxygen atom and point to aluminum atom. The initial product of the acid-base reaction is aluminum dimethyl ether chloride. (1)(CH3)3N + HCl→(CH3)3N+H + Cl-(2)AlCl3 + CH3OCH3→Al-Cl3O+(CH3)2ReferencesWikipedia
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CrO3/H2SO4 Q5. Which of the following statements about cyclooctatetraene is NOT true? a) The compound rapidly decolorizes Br2/CCl4 solutions. b) The compound rapidly decolorizes aqueous solutions of KMnO4. c) The compound readily adds hydrogen. d) The compound is comparable to benzene in stability. Q6. Which reagent(s) would serve as the basis for a simple chemical test that would distinguish between benzene and cyclohexene? a) NaOH in H2O b)
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Year 8 geography- global organization. Part A Organization 1 amnesty international a) what is Amnesty international Amnesty international is a democratic organization which is not funded by the government or other political party that complains to the government or other organizations for abusing human rights or falling to protect people. Plus amnesty international defends human rights for people whenever there are violated. b) what does amnesty international do The things that amnesty international
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of HCL with 2 grams of sodium chloride had the highest conductivity rate compared to the second most conductive solution‚ 50 milliliters of vinegar with 2 grams of sodium chloride‚ and the last conductive solution‚ 50 milliliters of distilled water with 2 grams of sodium chloride. In my first hypothesis I stated if I added sodium chloride to distilled water‚ than the overall conductivity will become more conductive than just distilled water‚ since the sodium chloride will break down into it’s respective
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Table of content Introduction.............................................................................pg. 1 Definition of corrosion…………………………….....................pg.2 Chemical change during corrosion…………………………….pg.3 Corrosion in Metals………………………………………………pg.4 Preventing corrosion……………………………………………..pg.4 ABSTRACT Introduction Corrosion has been a fundamental problem from the time humans started using metals. Many metallic substances such as steels‚ cars and ships become subjects to corrosion
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|Chemistry Review 1 |TEACHER ANSWER KEY | | |June 06‚ 2011 | | | |’see explanation below’
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