8/21/2009 |Secondary 2 | Shela Septania Usadi | [pic] Table of Contents Part 1: Abstract 1 Part 2: Introduction 1 Fire 1 Color Of Fire 2 Colored Flame 2 Part 3: A Simple Experiment‚ Green Flames 5 The Materials 5 The Method 5 A Higher Explanation 5 Part 4: Multicolored Fire 6 The Materials 6 The Method 6 Part 5: Uses Of Colored Fire 7 Part 6: Effects
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cation replaces another” and in an anion replacement reaction‚ “one anion replaces another from its solution.” When magnesium and copper sulfate react‚ a single replacement reaction occurs‚ and copper and magnesium sulfate are produced (Mg + CuSO4 MgSO4 + Cu). In this example‚ magnesium is above copper in the activity series so it is able to displace copper. An example of an anion replacement reaction is the reaction of bromine and potassium iodide‚ which produces potassium bromide and iodide (Br2
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SCIENCE (GOVERNMENTAL MODEL QUESTION PAPER) Time Allowed :2.30 Hours] [ Maximum Marks : 75 Instruction: Check the question paper for fairness of printing. If there is any lack of fairness‚ inform the Hall Supervisor immediately. Note :This question paper contains three Sections. SECTION -I (Marks: 15) Note : i) Answer all the 15 questions. ii) Choose the correct answer from the four alternatives given in the brackets. 15 x 115 1. Theory of natural selection was proposed by (Charles Darwin
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Fructose is the sugar found in fruit. It is a monosaccaride‚ and is a reducing sugar because it acts as a reductant in chemical reactions. This can be seen in the Benedict’s test where the fructose in the fruit juice will reduce CuSO4 to CuO when heated. Cu 2+ → Cu + The following table indicates approximate nutritional values for each of the three fruits to be tested: Energy / kJ Water / % Sugar / mg* Sugar Concentration / mg cm3 -1 Red Grapefruit 128 90 66 0.73 Lemon 51 96 30 0.30
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kvt\ln°msXbpamWv \mw Pohn°p∂Xpw acn°p∂Xpw. kµ¿`w Bhiys∏Sp∂ps≠¶n¬ AXnsemcp ¢otjbpan√. {]WbIYt]mse as‰¥p ¢otjbmWp≈Xv. ckIcambn ssIImcyw sNøp∂nStØmfw Imew AXv \ne\n¬°p Ibpw sNøp∂p’’. hn{ipX \S\mb Nm¿en Nmπn≥ C‚¿hyq°mc\mb dn®m¿Uv sadnamt\mSv ]d™XmWv Cu hm°pIƒ. AtX‚ PohnXsØ FgpXm\mWv Hmtcm FgpØpImcpw {ian°p∂Xv. AhnsSbmWv Nm¿en Nmπns‚ hm°pIƒ tN¿∂pt]mIp∂Xv. Nnc]cnNnXhpw \nch[n BfpIƒ FSpØp{]tbmKn°p∂Xpamb PohXsØØs∂ FgpXphm≥ XpSßptºmƒ AXv D]tbmKn®p]gInb Id≥kn t]mse apjn™p t]mbn´pw Id≥knbmbXn\m¬ D]tbmKnt°≠n
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1 Class XII: Chemistry Chapter 1: The Solid State Concept 1. Solid: Solid is a state of matter in which the constituting particles are arranged very closely. The constituent particles can be atoms‚ molecules or ions. Properties of solids: a. They have definite mass‚ volume and shape. b. Intermolecular distances are short and hence the intermolecular forces are strong. c. Their constituent particles have fixed positions and can only oscillate about their mean positions. d. They are incompressible
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The History of Paint Pigments Chem 111-404 April 24‚ 2013 Introduction: This report expresses five different pigments that were formed during chemical reactions. Three out of the total five reactions went through a metathesis‚ or double-replacment reaction. A metathesis reaction can be defined as “a chemical reaction in which an element or radical in one compound exchanges places with another element or radical in another compound.” (Webster). The other two pigments underwent a neutralization
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Al 22.989770 24.3050 26.981538 14.00674 15.9994 18.9984032 20.1797 16 28.0855 30.973761 17 18 S Cl Ar 32.066 35.4527 39.948 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Br Kr 39.0983 40.078 44.955910 47.867 50.9415 55.845 58.933200 58.6934 63.546 65.39 69.723 72.61 74.92160 Se 78.96 79.904 83.80 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb
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accumulation is often accompanied by physiological changes which can be used in biomonitoring for aquatic pollution. In this study‚ the impact of copper (Cu) on the growth of the duckweed Lemna minor‚ followed by its removal‚ was studied with 0.1–1.0 mg/L of Cu in a quarter Coïc and Lesaint solution at pH=6.1. In order to verify duckweed tolerance to Cu‚ photosynthesis was measured at the maximal concentration which caused no effect on the plant growth. The results showed that copper inhibited Lemna growth
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Laboratory Report 6 Date Performed: 04/02/14 Date Submitted: 04/15/14 Name: Lisa Jacoby Title: Physical and Chemical Properties Purpose: Investigating the chemical properties of pure chemical substances as well as exploring the physical properties of pure chemical substances Procedure: 1. I half-filled one well of a 24-well plate with 6M HCl and half-filled a second well of the 24-well plate with 6 M NaOH. I then sucked up these chemicals into their labeled pipets. I then set
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