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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1 mole of any substance can be defined as: Amount of a substance that contains as many particles (atoms‚ molecules or ions) as there are atoms in 12 g of the 12C isotope Avogadro number or Avogadro constant (NA); equal to 6.022 × 1023 particles Example − 1 mole of oxygen atoms = 6.022 × 1023 atoms 1 mole of carbon dioxide molecules = 6.022 × 1023 molecules 1 mole of sodium chloride = 6.022 × 1023 formula units of sodium chloride Molar mass of a substance can be defined as: Mass of one mole
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work invested in school is rewarded with more. Where kids have no saying cause mummy knows best or where a social life is not allowed. She got the results‚ but is that really the right way? “Why Chinese mothers are superior” was an article written by Amu Chua and brought in the Wall street journal in 2011. The article enlightens the cultural differences between the Asian- and
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Born in 1254 in Venice‚ Marco Polo is today a well-known figure of pre-Renaissance travels‚ and for his ground breaking travels to lands never before journeyed by Europeans. He was an Italian traveler and author‚ and spent the majority of his life travelling and exploring. His father Nicolo and uncle Maffeo‚ both merchants‚ had conducted business and trade in Constantinopole (now known as Istanbul) and the Crimea. However‚ when Genoa’s merchants‚ rivals to the Italian Polo’s‚ took over trade in
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metal is lead‚ still one of the world’s most useful substances‚ and one that never ceases to find a role in human society. Lead has the atomic symbol of Pb (for plumbum‚ lead in Latin). The atomic number for lead is 82 and the atomic mass is 207.19 AMU. It melts at about 327.502 oC and boils at 1740 oC. Lead is a heavy‚ ductile‚ soft‚ gray solid. It is soluble in nitric acid and insoluble in water. It is found in North‚ Central and South America‚ Australia‚ Africa and Europe. In modern times‚ lead
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Grade 11 Physics Study Guide SPH3U1 Unit 1: Kinematics + Intro How to count significant figures: -Embedded 0’s count (i.e. 101 has 3 sig figs) -Any numbers that aren’t zeros count (i.e. 5263 has 4 sig figs) -0’s after the decimal place count (i.e. 1.00 has 3 sig figs) -Trailing 0’s (i.e. 2000 has 4 sig figs) -Numbers after the first non-zero (i.e. 0.0002102 has 4 sig figs) How to add and subtract numbers with proper sig figs: The result will have the least amount of numbers after the decimal
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