Chemistry Review (mid-term) 1. Use the equation for atomic mass to answer the following questions. (http://johnheilchem10.escuelacampoalegre.wikispaces.net/file/view/average+atomic+mass+calculations+-+3.pdf) 1. Argon has three naturally occurring isotopes: argon-36‚ argon-38‚ and argon-40. Based on argon’sreported atomic mass‚ which isotope do you think is the most abundant in nature? Explain. 2. Copper is made of two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu.
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risk to this experiment as it has harmless equipment used method: 1)weigh closed can of soft drink and record results 2) open can of soft drink 3) weigh a can filled with 375ml of water 4) record mass of open soft drink and can of water daily over several days Diagram: Results: group Mass (g) 1 2.6 2 2.9 3 2.5 4 2.4 5 1.8 (Group 2 and 5 are outliers) mean: 2.5 2.6 + 2.5 + 2.4 = 7.5 7.5/3 = 2.5 Calculations: Result for Group 1: Experimental can
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TDDC17 -‐ Lab 3 Part 2 Q5 P (Meltdown) = 0‚02578 P(Meltdown | Ica weather) = 0.03472 b) Suppose that both warning sensors indicate failure. What is the risk of a meltdown in that case? Compare this result with the risk of a melt-‐down when there is an actual pump failure and water leak. What is the
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Vocab: 2.1 Mass: Measure of amount of matter in an object Volume: Measure of space occupied by object Extensive property: property that depends on amount of matter in a sample i.e.: mass and volume Intensive property: Property that depends on the type of matter in a sample(not amount) i.e.: type of basketball (leather; inside‚ rubber; outside) Substance: Matter that has a uniform and definite composition Physical property: Quality or condition of a substance that can be observed without
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Unit 2 lab 1: common linux commands 1. try giving the following commands and observe the behavior with each combination of options and arguments. A. list the names of the files in the working directory Is. Desktop Documents Downloads Music Pictures Public Templates Videos B. by default‚ Is does not list files that have hidden filenames 9filenames that begin with a period; Sobell‚ page 190). List the names of all files in the working directory‚ including those with hidden file names. Is
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/31 CHEMISTRY Paper 3 Practical Test October/November 2010 CONFIDENTIAL INSTRUCTIONS *4711088250* Great care should be taken to ensure that any confidential information given does not reach the candidates either directly or indirectly. The Supervisor’s attention is drawn to the form on page 7 which must be completed and returned with the scripts. If you have any problems
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Chemistry Ozone Depletion Ozone depletion describes two distinct but related phenomena observed since the late 1970s: a steady decline of about 4% per decade in the total volume of ozone in Earth’s stratosphere (the ozone layer)‚ and a much larger springtime decrease in stratospheric ozone over Earth’s polar regions. The latter phenomenon is referred to as theozone hole. In addition to these well-known stratospheric phenomena‚ there are also springtime polartropospheric ozone depletion events. The
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1. Standards a. 3.3.1-3.1.6‚ 3.2.1-3.2.7 2. Objectives b. 3.1.4-3.1.6 3. Properties of Water c. Transparency i. Allows light to pass through the water d. Cohesion ii. Water molecules form hydrogen bonds between them. This produces a surface tension which makes it hard for a small object to break the surface. e. Universal Solvent iii. The polarity of water molecules allows both organic and inorganic particles to dissolve in it
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1/28/2015 sql lab @ home 2 | SQL LAB @ HOME SQL LAB @ HOME search Classic Flipcard Magazine Mosaic Sidebar Snapshot Timeslide sql lab @ home 12 sql lab @ home11 sql lab @ home 10 sql lab @ home 2 1. Display the details of all the customers. (Use the AdventureWorks database) select * from [Sales].[Customer] sql lab @ home 9 sql lab @ home 8 2. Display the ID‚ type‚ number‚ and expiry year of all the credit cards in the following format. (Use the AdventureWorks database) sql lab @ home 7
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BF3 B F F SF4 F Molecule Electron diagram F S F F Cl PCl5 Cl Cl P Cl Cl SF6 F F F S F F F 2 The following table summarizes the relationship between the arrangement of electron pairs around the central atom of a molecule or polyatomic ion and the shape of the species. Total number of electron pairs* in the outermost shell of the central atom of a molecule or polyatomic ion 2 linear Arrangement of electron pairs* Shape of the molecule or polyatomic ion Example(s) B
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