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SI base units

Mole conversions - Notes

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Chemical Quantities The MOLE CHAPTER 7 THE MOLE: A MEASUREMENT OF MATTER A mole (mol) is a unit of measurement Types of measurement include Counting/weighing/volume/ number of units Examples of other Quantitative measurement units Pair/Dozen/Ream Mole The term representative particles is a generic term that can refer to Atoms (single element), or Diatomic molecules (two of one type of element), or Formula units (what makes up an ionic compound) or Molecules (what makes up a molecular compound), or electrons or protons, or ions, etc Mole It is typically referred to as a mole of atoms or a mole of molecules A mole is also called Avogadro?s number For example: One mole would be 6.022 x 1023 representative particles Why use moles?

Chapter 4

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Chemistry 1210: General Chemistry Dr. Gina M. Florio 13 September 2012 Jespersen, Brady, Hyslop, Chapter 4 The Mole and Stoichiometry CHE 1210 Lecture Slides G.M. Florio 1 Conversion Factors Conversion Factor ? relates one quantity to another ? used to convert between two units in chemistry What is my height in centimeters (cm) if I am 5 feet 4 inches tall? 1. How many inches are in a foot? 2. How many inches are in a centimeter? 12 inches = 1 foot 1 inch = 2.54 cm Factor Label Method The factor-label method, or dimensional analysis lets us treat a numerical problem as one involving a conversion from one kind of units to another using conversion factors.

Chapter 3

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Chapter 3.1 Average mass= total mass/ number of objects massed 3.2 Mass spectrometer- most accurate method currently availbe for comparing masses of atoms 3.3 Avogadro?s number- 6.022X 10^23 = one mole of something Molar mass- mass in grams of one mole of the compound g/mol Find on periodic table 3.5 Percent comp: Mass/ weight percent= (Mass of element in compound/ mass of compound)X100 3.6 Molecular formula= (empirical formula)n N is an integer To find molec formula take molar mass/ empirical formula mass and that is n SEE PAGE 96 IF CONFUSED
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