number of representative particles number of representative particles x 1 mole / 6.02 x 10²³ representative particles = number of moles II. Mass and the Mole A. The Mass of a Mole each atom of carbon-12 has a mass of 12 atomic mass units (amu). atomic masses of all other elements are established relative to carbon-12 molar mass: the mass in grams of any pure substance. molar mass of any element is numerically equal to its atomic mass and has the units g/mol. B. Using Molar Mass
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currently in the ARMY and I want to become a psychologist. I’m planning on transferring my military credits along with the credits I received through Argosy University to fulfill my desire to get the degree I want. My course selections that I choose at AMU will be the ones needed to fulfill the institution’s requirements to grant the degree. My main goal is to provide for my family. Getting this degree will help me apply to various other schools granting the PSYD degree and
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Outgoing Defense Secretary Leon E. Panetta announced Thursday a lifting of the ban on female service members in combat roles‚ a watershed policy change that was informed by women’s valor in Iraq and Afghanistan and that removes the remaining barrier to a fully inclusive military‚ defense officials said. Panetta made the decision “upon the recommendation of the Joint Chiefs of Staff‚” a senior defense official said Wednesday‚ an assertion that stunned female veteran activists who said they assumed
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newly produced gas contained the element oxygen. However‚ in 1810 Sir Humphry Davy proved that this gas was actually its own distinct element. The chemical symbol for Chlorine is Cl; the element has an atomic number of 17 and an atomic mass of 35.4527 amu. There are two natural isotopes for Chlorine‚ 35Cl and 37Cl‚ which have an abundance of 75.78% and 24.22% respectively. On the periodic table‚ chlorine
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Chapter 2 The Components of Matter Elements‚ Compounds‚ and Mixtures: An Atomic Overview An element consists of only one kind of atom. An element is one kind of substance – the composition is fixed. Each element is unique because the properties of its atoms are unique. Molecules are structures containing two or more atoms chemically bound together. Diatomic molecules are two-atom molecules such as elemental oxygen. A compound is a type of matter in which two or more different elements are chemically
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Jarrett Sears Dr. Hummel Chem 121 2/7/13 A Chemical Reaction between Tin and Nitric Acid Introduction: Finding the products made from the components of tin metal and nitric acid is the ultimate objective of this lab; the formula of the products will be found in the CRC handbook thereafter. Procedure: First‚ obtain a clean crucible‚ and heat it under a Bunsen burner until it is as hot as possible‚ about 15 minutes within a fume hood unit. The Bunsen burner will be used under the fume
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School: Arts and Humanities Course Number: ENGL102 Course Name: Effectiveness in Writing Credit Hours: 3 Length of Course: 8 Weeks Prerequisite: ENGL101 Table of Contents Instructor Information Evaluation Procedures Course Description Grading Scale Course Scope Course Outline Course Objectives Policies Course Delivery Method Academic Services Course Resources Selected Bibliography Instructor Information See your classroom for your instructor’s contact
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Chemistry 105 A Final Exam 06/24/10 First Letter of last Name Dr. Jessica Parr Question 1 2 3 4 5 6 7 8 9 10 Maximum points 18 8 12 12 8 10 12 10 6 6 (Sub-T) PLEASE PRINT YOUR NAME IN BLOCK LETTERS Name: __________________________________________ Last 4 Digits of USC ID:_____ _____ _____ _____ Lab TA’s Name: _________________________________ Score (102) Grader Question 11 12 13 14 15 16 17 18 19 20 (Sub-T) TOTAL
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Lithium Man 7 looks like a AAA battery and weighs 7 amu. He is silver colored with a red and yellow cape that has the number 3 on it. His best friend is Lithium Man 6‚ who looks exactly like him but a little bit thinner. They both live on 152nd street in Lithos City. Lithium Man 7 lives in house 2‚447. Lithium Man 6 lives in house 1‚817. Lithium Man 6 and 7 are both .534 meters tall. Lithium Man 6 and 7 are 199 years old. They can’t be in the water very long or they will dissolve into lithium hydroxide
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DIVISION OF CHEMISTRY :MODULE: GENERAL CHEMISTRY (CHY2021) TUTORIAL # 2 DATE: September 2013 1. Define the following terms: mass number‚ atomic number and the atomic mass unit (amu). 2. With the help of The Periodic Table‚ complete the table below. Symbol Atomic # Proton # Neutron # # of Electrons Mass Number Charge Ar 19 31 17 18 35 20 18 3+ 40 3. In your own words‚ explain Thomson’s and Rutherford’s contribution to the atomic theory. Give sketches to substantiate your answer. 4. Explain
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