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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An instrument or procedure that measures attibutes or properties of an individual I see ferried to as a TEST The precision‚ consistency‚ or repeat ability of questions or tests specifically refers to ACCOUNTABILITY Measurement TAKES PLACE WHEN SCORES ARE OBTAINED The word or phrase which best describes the relationship between test‚ measurment‚ and evaluation is VERY MUCH RELATED Which of the following provides performance indicators‚ assessment tasks‚ and rubrics for measuring student achievement
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Source: Chemistry by C. Mortimer PP 1-5 Chemistry by R.S. de Borja PP 1-5 Definition of Chemistry Chemistry is concerned with the composition and the structure of substances and with the forces that hold this structure together. And the changes that undergoes with the energy involved in them. History Chemistry which emerged‚ took hundreds of years to develop the history of its development can be divided ranging into five
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oxygen carbon monoxide carbon water Balance this symbol equation for incomplete Balance this symbol equation for incomplete combustion of methane Drag this to Drag this to the target to the target to reveal the reveal the answers. answers. CH4 O2 CO C H 2O FYI carbon is commonly called soot • Combustion of 2‚2dimethylpentane • Write the chemical formula and the balanced chemical equation for this combustion reaction. structural diagram Balanced equation
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Isotopes and average atomic mass Isotope: element variations with different atomic mass but same atomic number Isotopic Abundance: the relative amount in which each isotope of an element Calculating: given 2 isotopes of an element [B: 10.01u] [B: 11.01u] 1) Given average atomic mass: 10.81u If given percentages‚ you can find average atomic mass by adding each portion 2) Set variables for unknown values Let x represent % abundance for 10/5 B Let 1-x represent % abundance for 11/5 B Calculate:
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ME 4600:483 – Lab Notes Revised 04/07/05 Flow Measurement Table of Contents Flow Measurement ......................................................................................................................... 1 I. Objective ................................................................................................................................. 1 II. Apparatus...................................................................................................................
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Experiments in physics lab report Department of Electrical Engineering Isabela State University Ilagan Campus‚ Calamagui 2nd‚ City of Ilagan‚ Isabela baccaljoemel@yahoo.com Submitted to: Engr. Rafael S. Ramos Physics12 Professor Submitted by: Joemel L. Baccal BSEE IIA Experiments in Physics Lab Report Joemel L. Baccal Department of Electrical Engineering Isabela State University - Ilagan Campus‚ Calamagui 2nd‚ City of Ilagan‚ Isabela baccaljoemel@yahoo.com Abstract In
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Federalism is a laboratory of democracy because states and cities are vital parts of American government. States should cater its laws to the values and wants of the people in the state. With certain situations and instances‚ national laws do not work across the nation. For example‚ laws regarding hunting‚ fishing‚ and mining may be pertinent in Alaska‚ but would be completely impractical and even dangerous if applied to some other states. Federalism allows for each individual state to create laws
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different compounds of sulfur and fluorine. * In ‚ the mass of fluorine per gram of sulfur is 3.55 . * In the other compound‚ ‚ the mass of fluorine per gram of sulfur is 1.18 . What is the value of for the second compound? Express your answer as an integer. 3.0
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ALCHEMY TO CHEMISTRY Can we say that alchemy and chemistry are two different things? Actually no‚ we can’t. Alchemy is the pioneer of today’s modern chemistry. As the time passed alchemy has changed and developed to form Chemistry. Therefore we shouldn’t think that they are two different subjects. In this article‚ first of all you will learn how alchemy was found and evolved .After that how it transitioned from alchemy to chemistry and finally the similarities and differences between them.
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