For those of you who came to the review in class today‚ The stoichiometry question from class. I read the answer to the wrong decimal place. --What is the total mass of oxygen in 0.26mol of Cu2O? Find the percent of oxygen in Cu2O first. The molar mass of Cu2O is 143‚ the mass of just the oxygen in it is 16. % Composition of oxygen would be 16/143 times 100 is 11.19%‚ To determine the mass of Cu2O in 0.26 mol‚ multiply by the molar mass of Cu2O. This gives
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Service package of MITSOB Before describing about the service package of MITSOB I would like to give an overview of what SERVICE is .. “Any act or performance which one party offers to another that is essentially intangible in nature and which never result in ownership of anything is known as service .” Now according to this definition of service I would like to define the service package of MITSOB MITSOB is a service firm it only and only offers service. MITSOB is an education institution which
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1. Enter the Second Life site (secondlife.com) and identify EC activities there. In second life virtual world‚ user creating a citizen inside the virtual world‚ they can be a business creator or a buyer; they can provide goods for sell‚ exchange information via the second life virtual world. 2. Which types of transactions are observable at the site? Inside second life we can find B2C‚ B2B transactions. Second life using virtual money call L$‚ user pay L$ to buy land or item‚ when seller collected
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Determining the Stoichiometry of Chemical Reactions Mrs. Farrales Nikita Pandya October 23‚ 2012 December 3‚ 2012 INRODUCTION In the method of continuous variations the total number of moles of reactants is kept constant for the series of measurements. Each measurement is made with a different mole ratio of reactants. A mole ratio
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LEARNING TASK NO. 4B Composition Stoichiometry Problems Mole Relationship from Chemical Formulas: a) Determine the number of moles of chloride ions in 2.53 mol ZnCl2. b) Calculate the number of moles of each element in 1.25 mol glucose (C6H12O6). c) How many molecules of oxygen atoms are present in 5.00 mol diphosphorus pentoxide? d) Calculate the number of moles of hydrogen atoms in 11.5 mol water. e) A sample of ethanol (C2H5OH) has a mass of 45.6 g.How many carbon atoms does the sample
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Purpose: In this experiment I will predict the amount of product produced in a precipitation reaction using stoichiometry by accurately measuring the reactants and products of the reaction. I will also determine the actual yield vs. the theoretical yield by calculating the percent yield. Materials: 1 Distilled water 1 Paper towels 1 Small paper cup 1 Coffee cup or mug 1 Beaker‚ 100 mL‚ glass 1 Funnel 1 Cylinder‚ 25 mL 1 Goggles-Safety 1 Scale-Digital-500g 1 Weighing boat‚ Plastic 1 CaCl2·2 H2O-Calcium
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Walter A. Shewhart March 18‚ 1981- March 11‚ 1967 Walter Andrew Shewhart is regarded by many as the “father of statistical quality control.” He was born in New Canton‚ Illinois on March 18‚ 1891 to Anton and Esta Barney Shewhart. Walter attained his bachelor’s and master’s from the University of Illinois in physics and graduated with is PhD from UC Berkely in 1917. Throughout his adulthood‚ he was a professor at both universities and ran the physics department at the Wisconsin Normal School
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Fashion blogs are bad Did you know that a fashion blog is actually a drug‚ well it’s not classified as a drug but you get addicted to them. You stop seeing the importance in life such as news‚ disasters and so on. All that’s on your mind is fashion‚ shoes and makeup. Fashion blogs also makes you spend money. I think fashion blogs are bad and here comes some reasons. First of all fashion blogs are only nonsense. All there is to read are clothes‚ makeup‚ bags and shoes. All their readers
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Gracen Seiler April 7th‚ 2015 Section- 109 Investigating Stoichiometry with Sodium Salts of Carbonic Acid Introduction- This experiment is intended to help find a better understanding of chemical stoichiometry through titrations of NaHCO3 and NA2CO3 with HCl. A chemical reaction is a process that involves rearrangement of the molecular or ionic structure of a substance‚ as opposed to a change in physical form in a nuclear reaction. Titration is when a measured amount of
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Ch. 1 Fundamentals of Chemistry Subchapter – Stoichiometry and Units 1. An element X forms an oxide with the formula X4O10. If 31 g of X combines with 40 g of oxygen‚ what is the identity of X? A. N B. P C. C D. S Correct Answer: B: P Explanation: We can solve for the atomic mass of X to identify it. The amount in g of X for any amount in g of O is given by: Rearranging the above equation and substituting the given mass of X and O‚ we get: Thus‚ the atomic mass of X
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