Observation of Different Photons when Elements are Heated Introduction: The bright line spectrum is the range of colorful lights that are emitted from an atom in its excited state. A “normal” atom‚ or an atom in its ground state‚ is when all of the atom’s electrons are in their proper energy level. When an atom is in its excited state‚ electrons jump to different energy levels making them unstable. As the electron tries to get back to its respective energy level‚ energy is emitted in the form
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Name: Date: Graded Assignment Lab Report Answer the questions below. When you have finished‚ submit this assignment to your teacher by the due date for full credit. (5 points) Score 1. Which combinations of substances resulted in a chemical change? Answer: The potassium nitrate and the ammounuiam hydroxide had a chemical change. It started bubbling and getting really foggy. The calcium nitrate and ammonuiam hydroxide did nothing. It’s all clear still‚ but no chemical change. The copper nitrate
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Ideal gases: No volume‚ no intermolecular forces Atoms/Molecules that are gases at room temperature Noble Gases. H2‚ N2‚ O2‚ F2‚ Cl2. Methane‚ ethane‚ propane‚ butane Gas: Fills the container. Forces of intermolecular attraction are weak. Vapor: Gas state of a substance that is usually a liquid or solid Ek = (Kinetic energy of a gas molecule) Mu2/2. U2 = 3 (R Gas Constant) (Temperature in Kelvin) / molar mass in kg Speed goes Up with temp and down with mass Pressure: Collisions with the side of a
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RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
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Decomposition of Sodium Chlorate to Create Oxygen Gas Introduction: There are several types of chemical reactions. Those reactions include synthesis‚ decomposition‚ single replacement‚ and double replacement. In this experiment‚ we will be decomposing sodium chlorate to create oxygen gas. In a decomposition reaction‚ a chemical compound is being separated into elements or simpler compounds. AB → A + B is a simple way of expressing what happens in a decomposition reaction‚ AB break down into A
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~ Graded Assignment I) Name: . 1\ \ \ ~o ni-! SC1303A/304A: Chemistry 1Unit 41 Lesson 17: Unit Test I .’ / j ! Graded Assignment Unit Test‚ Part 2 Answer the questions below. You may use the periodic table in the Chemistry: Problems and Solutions book for this test. When you have finished. submit this assignment to your teacher by the due date for full credit. (5 points) 1. You have three elements. A. B. and C. with the following electronegativity values: A = 0.9 B =3.0 C = 3.5 You
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Laboratory Report: Experiment 3 Analysis of commercial vitamin C tablets Name: Cheung Chun Hin‚ Harry Class: 6L (12) Date: 14-10-2009 Objective: To determine the content of vitamin C in commercial tablets (redox titration and back titration) Principle of method: Vitamin C‚ which is ascorbic acid‚ reacts with iodine rapidly in an acidic medium. C6H8O6 (aq) + I2 (aq) C6H6O6 (aq) + 2H+(aq) + 2I- (aq) Since iodine dissolves slightly in water‚ ascorbic acid cannot be titrated
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relationship [F4-Chapter 8] Q2: To study the relationship between the concentration of CO2 and the rate of photosynthesis [F4-Chapter 6] 2004 Q1; To determine the % of vitamin C in fruit juices using DCPIP solution [F4-Chapter 6] Q2: To estimate the size of the bird population [F4-Chapter 8] 2005 Q1: To determine and compare the energy content in white bread and peanuts [F4-Chapter 6] Q2: To determine the concentration of the solution which will maintain the mass of plant tissues. [F4-Chapter
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September 18‚ 2011 Period 8 AP Bio Ms. Dahle September 12‚ 2011 TITLE: Population Genetics and Evolution Within a Gene Pool INTRODUCTION: The Hardy-Weinberg scheme is a way of viewing evolution as changes in the frequency of alleles in a population of organisms. If A and a are alleles for a particular gene and each individual has two alleles then p is the frequency of the A allele and q is the frequency of a alleles. The frequency of the possible diploid combinations is expressed in the equation
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08-02-10 Static Analysis Considerations for Stack Usage Static Analysis Considerations for Stack Usage ESC-423 Gerald T. Rigdon Fellow‚ Software Engineering Boston Scientific‚ Inc. gerald.rigdon@bsci.com Hiten Doshi Fellow‚ Software Engineering Boston Scientific‚ Inc. hiten.doshi@bsci.com Xin Zheng Software Engineer Boston Scientific‚ Inc. xin.zheng@bsci.com In [3]‚ David N. Kleidermacher‚ chief technology officer at Green Hills Software‚ discussed future directions for
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