Chemistry 1: PROBLEM SET SY 2012/2013 CLASS #: _______________ NAME_________________________________________ SECTION: ______________________ Stoichiometry II - Mole Calculations/ Limiting and Excess Reagent – Lecture Notes 1. Given the balanced equation N2(g) + 3H2(g) 2NH3(g) How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 2. Given the equation: SiO2 + HF SiF4 + H2O a. Calculate the number of moles HF that would completely react with 2.5 moles of
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Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal‚ procedure‚ data analysis method‚ and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report‚ a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual‚ grammatical‚ typographical
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silicate‚ artisans also helped with the discovery of a bright yellow made from lead and antimony oxides‚ the vinegar fumes used to corrode lead and copper into lead white 2PbCO3•Pb(OH)2‚ and green also known as verdigris copper(II) acetate. The red color known as vermillion demonstrated an important cross between are and chemistry in color. Vermilion is made up of mercury sulfide‚ which has been used as a pigment since roman times. Chemists discovered that by making the compound by purposefully combining
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Lab Report 1 Introduction: Proper chemical formulas entitle many challenges such as the Law of Multiple proportions that states that there may be more than one plausible mole ratio for the elements in that compound. However if we determine the mass of each element in the compound we will be able to get the true chemical formula. In this experiment‚ we used the law of definite proportions to find the chemical formula for a hydrated compound containing copper‚ chlorine‚ and water molecules
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Kiley O’Toole Lab Report 3 Purpose The purpose of this lab was to uncover the number of layers of zinc atoms around a piece of galvanized iron. This was done by pouring the hydrochloric acid onto the galvanized iron‚ thus removing the zinc from the piece of metal. Laboratory Procedure 1. Measured and recorded the mass of a piece of galvanized iron using a centigram balance and a ruler 2. Measured and recorded the length and width of the galvanized iron using the ruler 3. Put the
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LAB REPORT FOR EXPERIMENT 3 COPPER CYCLE OLANREWAJU OYINDAMOLA TUESDAY 27TH February 2013 Abstract This experiment is based on copper‚ to synthesize some copper compound using Copper (II) nitrate solution to obtain copper metal at the end. Changes of copper complexes when various are added and filtering out the precipitate by using Buchner funnel for vacuum filtration .The experiment started with preparation of copper (II) hydroxide and addition of copper oxide then addition of droplets
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1998: Notes on the stratigraphy and chronology of Iron Age Tacanach‚ Tel Aviv 35‚ 208– Finkelstein‚ I. 2001: The rise of Jerusalem and Judah: the missing link‚ Levant 33‚ 105–115 MacDonald‚ K. 2011: Special issue: innovation and the evolution of human behavior Early Metallurgy in Cyprus‚ 4000–500 BC‚ Larnaca‚ Cyprus 1–6 June 1981‚ 303–312‚ Nicosia Gosden‚ C. 1994: Social Being and Time‚ Oxford Gosden‚ C Gottlieb‚ Y. 2010: The advent of the Age of Iron in the Land of Israel: a review and reassessment
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# Now You See It – Copper Cycle Lab The purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the
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NT1210 Lab 4.1 : Copper Cabling Exercise 4.1.1 Stability‚ consistency‚ and minimization of packet errors. Exercise 4.1.2 The power requirements to send data is much lower than the requirements to transfer electricity. Exercise 4.1.3 Protection from power frequency‚ radio frequency interference‚ reducing errors generated. Exercise 4.1.4 Category Maximum Speed Application 1 1Mbps VOICE ONLY( TELEPHONE WIRES) 2 4Mbps LOCAL TALK & TELEPHONE 3 16Mbps 10 BASE T ETHERNET 4 20Mbps
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moles-stoichiometry-practice-problems Now you’re ready to use what you know about conversion factors to solve some stoichiometric problems in chemistry. Almost all stoichiometric problems can be solved in just four simple steps: 1.Balance the equation. 2.Convert units of a given substance to moles. 3.Using the mole ratio‚ calculate the moles of substance yielded by the reaction. 4.Convert moles of wanted substance to desired units. These "simple" steps probably look complicated at first
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