MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular mass
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Determination of Chemical Formulae: The Reaction of Zinc and Iodine By Sarah Abstract: The main objective of this experiment was to use to the reaction between zinc and iodine to examine the validity of the Law of Conservation of Mass and the Law of Constant Composition. The Law of Constant Composition was tested by determining the mass of each of the reactants‚ zinc and iodine‚ and comparing their total to the mass of the zinc iodide product plus the excess zinc. The total mass of the reactants
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of $1‚000 30-May Smith paid dividends to himself of $1‚400 Requirements: 1 Enter the transactions for May into the accounting equation‚ calculating new balances after each entry. Assets = Liabilities + Stockholders’ Equity Cash + Accounts receivable + Supplies + Equipment Accounts payable Common stock + Service revenue - Salaries expense - Rent
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A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electromagnetic force attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds" such as dipole-dipole interactions‚ the London dispersion force and hydrogen bonding
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Lecture No. 1 Chemical Kinetics 1.1 The Rate of a Reaction Chemical Kinetics is the area of Chemistry that is concerned with the speed‚ rate or mechanism at which a chemical reaction occurs. Reaction Rate is the change in the concentration of a reactant or product with time (i.e. M/s). It measures how fast a reactant is consumed and how fast a product is formed. 1.2 WRITING RATE EXPRESSIONS Consider the following hypothetical reaction. A + 2B ( 3C + D Rate = - rate
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Week One Exercise Assignment Basic Accounting Equations 1. Recognition of normal balances The following items appeared in the accounting records of Triguero ’s‚ a retail music store that also sponsors concerts. Classify each of the items as an asset‚ liability; revenue; or expense from the company ’s viewpoint. Also indicate the normal account balance of each item. a. Amounts paid to a mall for rent. b. Amounts to be paid in 10 days to suppliers. c. A new fax machine purchased for
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Chemical Bonding Chemical compounds are formed by the joining of two or more atoms. A stable compound occurs when the total energy of the combination has lower energy than the separated atoms. The bound state implies a net attractive force between the atoms ... a chemical bond. The two extreme cases of chemical bonds are: Covalent bond: bond in which one or more pairs of electrons are shared by two atoms. Ionic bond: bond in which one or more electrons from one atom are removed and attached to
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Elements of Information Theory Thomas M. Cover‚ Joy A. Thomas Copyright 1991 John Wiley & Sons‚ Inc. Print ISBN 0-471-06259-6 Online ISBN 0-471-20061-1 Elements of Information Theory Elements of Information Theory Thomas M. Cover‚ Joy A. Thomas Copyright 1991 John Wiley & Sons‚ Inc. Print ISBN 0-471-06259-6 Online ISBN 0-471-20061-1 WILEY SERIES IN TELECOMMUNICATIONS Donald L. Schilling‚ Editor City College of New York Digital Telephony‚ 2nd Edition John Bellamy Elements of
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would increase the value of the business. Next we had to but the land for $150‚000. This was a debit and credit line item under assets because we used cash and credit $100‚000 under liability because we now owe a debt. After fully balancing the equation‚ we had $200‚ 00 in assets (what we invested) and $100‚000 in liabilities and shareholder’s equity. Chapter 1 Accounting in Action: E 1-5 pg. 34 Instructions: For each of the three situations‚ say if the accounting method used is correct
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Introduction: A balanced chemical equation has reactants and product that has to represent a formulae. The amount of each element‚ number needs to be the same in either side of the equation. (E.g.‚ HCl(aq)+NaHCO3(s) reacts to produce NaCl(aq)+H2O(I)+CO2(g)‚ this is the equation given for this lab). This help us view the study of Law of Conservation of Mass‚ when either side of equation is equally balanced. The calculation for formula mass helps determine if you need to convert grams to a particular
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