1) How many hydrogen atoms are represented in the formula (CH3)2CH2? 1) _______ A) 8 B) 6 C) 9 D) 5 2) Which has the highest percent mass of Cl? 2) _______ A) C2Cl6 B) CCl4 C) C2Cl4 D) C2Cl2 3) The correct formula for Sodium Nitride is: 3) _______ A) Na3N B) NaNO2 C) NaNO3 D) Na2NO3 4) How many moles of NO3 are there in 6.2g? 4) _______ A) 0.05 B) 10 C) 0.10 D) 384 5) Consider the following equation: 4NH4 + 5O2 → 4 NO + 6H2O How many moles of water
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Using colorimetry to find the order of a reaction introduction Coloured solutions absorb some of the wavelengths in the visible region of the electromagnetic spectrum. A colorimeter can be used to measure the amount of light absorbed by a solution (the absorbance) and this is proportional to the concentration of the coloured species present. In this experiment you will use a colorimeter to investigate the reaction between bromine and methanoic acid:- Br2 (aq) + HCOOH (aq) ↓ 2Br-
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Page 1 of 10 5.111 Principles of Chemical Science EXAM # 3 ============================================================================ Write legibly your name and your TA’s name below. Do not open the exam until the start of the exam is announced. The exam is closed notes and closed book. You have 50 minutes (1 academic hour) to complete it. ● Read each part of each problem carefully. ● Write your answers legibly in the corresponding spaces of the attached sheets. ● For problems requiring
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Pre Lab Experiment 8 DETERMINATION OF % COMPOSITION OF PENNIES USING REDOX AND DOUBLE DISPLACEMENT (PRECIPITATION) REACTIONS Objectives: 1. Learn how to determinate the percent composition 2. Learn how to get the percent using oxidation reduction and double reactions 3. To become more familiar with the use titration techniques 4. To learn how to get the salt out of an quimical Background: To develop and utilize procedures to determine the percent composition‚ of ZnCI2. As well titrating
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CHEMISTRY IN OUR LIFE Science is considered as a continuous human effort to systemize knowledge to describe and understand nature. Chemistry is defined as that branch of science which deals with the study of composition structure and properties of matter and the changes which the matter undergoes under different condition and the laws which govern these changes. Chemistry- a key of mystery is a subject which is necessary for living in this world. Today chemistry has become a daily use
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Nuclear engineering is the practical application of the breakdown of atomic nuclei and/or other sub-atomic physics‚ based on the principles of nuclear physics. It includes‚ but is not limited to‚ the interaction and maintenance of nuclear fission systems and components specifically‚ nuclear reactors‚ nuclear power plants‚ and/or nuclear weapons. The field may also include the study of nuclear fusion‚ medical and other applications of (generally ionizing) radiation‚ nuclear safety‚ heat/thermodynamics
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CHEM 301 LECTURE Unit 1 0 . COORDINATION CHEMISTRY Factors t hat affect solubility: Common ion: decrease in solubility Complex ion: increase in solubility How does complex ion formation increase solubility? Consider the complex ion formation between silver and ammonia: + Ag + 2NH3 A g(NH3 )2 + Kf = 1 .5 x 10 7 where Kf i s the formation constant (always >1 ‚ formation of the complex is highly favorable) Complex ion formation increases the solubility of sol ids in water
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Introduction Chemistry: Chemistry is the science of matter‚ especially its chemical reactions‚ but also its composition‚ structure and properties. [pic] Daily Life: All the things that happen or that you do regularly. Chemistry in Daily Life: Chemistry is a big part of our everyday life. We find chemistry in daily life in the foods we eat‚ the air we breathe‚ our soap‚ our emotions and literally every object we can see or touch. Here’s a look at some everyday chemistry. [pic] Actually‚ we found
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A World Without Chemistry A world without chemmistry would be simply disastrous.We would have no phones‚ no lightbulbs‚ no social networking! Almost everything we use in our daily lifes depends on chemistry to exist‚ from the food we eat to the clothes on our backs. If we had never studied chemistry we wouldn’t have liquid oxygen. This was developed in the 1800s and is now probably best-known for its role as rocket fuel. Without rockets the space race wouldn’t have happened‚ or all the everyday
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Stage 2 Chemistry Investigation Folio: Practical – Galvanic Cell Name: YY Names of Partner: ZZ Part A Investigation Design Proposal: Purpose of Experiment: To determine the effect of concentration of reactants on the current produced by a galvanic cell. Hypothesis: The greater the concentration of solution in the two half cells reacting with the two metals to produce current‚ the greater the flow of current will be produced from the galvanic cell. Independent Variable: Concentration
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