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Chemical formulas

Mass Relationships in Chemical Reactions Practice QuestionsG

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Chemistry
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Stoichiometry
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Yield
Atomic mass
Mole
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Conversion
Mass fraction
Molar mass

Atomic mass mass of an atom in atomic mass units An atomic mass unit is equal to? One twelth the mass of one carbon-12 atom The average atomic mass is equal to? atomic mass on the periodic table Isotopes are atoms of the same element with a different number of ___ and so they have different ___ 1) neutron 2) masses Mole Is a counter and relates to mass.* It is similar to a dozen. *It can count the number atoms/molecules/particles. Molar Mass *is the mass of one mole of the substance. *g/mol = atomic mass of the element *molar mass of an element contains mols of atoms Avogadro's number particles/atoms/molecueles > moles *6.022x10^23 Percent Composition Mass of element/ mass of compound x 100 Tell how much an element contributes to the mass of the compound

Percent composition and mole conversions pt 2 - Notes

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Mole fraction

Percent Composition PURPOSE and PROCEDURE To find out the percentage (by mass) of a particular element in a chemical compound. Calculate the molar mass for the compound. Divide the mass of the element you want to find the percentage of by the molar mass of the compound. Write the answer you get from step B in percentage form. Round your percentage to the tenth. EXAMPLES What percent of Cu2O is O? 2 x Cu = 2 x 63.5 = 127.0 g 1 x O = 1 x 16.0 = 16.0 g molar mass = 143.0 grams/mol % O = Part ? Total = 16.0 ? 143 = .1118 x 100% = 11.2% Example What percent of Al2O3 is Al? 2 x Al = 2 x 27.0 = 54.0 g 3 x O = 3 x 16.0 = 48.0 g molar mass = 102.0 grams/mole % Al = Part ? Total = 54 ? 102 = .5294 x 100% = 52.9% Practice - Find the percent composition

Chapter 4

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measurement
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SI base units
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behavior
Human development
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Love
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Ethology
Personal life
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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.

Campbell Biology Chapter 4 Study Guide

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Alkane

Name Period Chapter 4: Carbon and the Molecular Diversity of Life Concept 4.1 Organic chemistry is the study of carbon compounds 1. Study this figure of Stanley Miller?s experiment to simulate conditions thought to have existed on the early Earth. Explain the elements of this experiment, using arrows to indicate what occurs in various parts of the apparatus. What was collected in the sample for chemical analysis? What was concluded from the results of this experiment? Concept 4.2 Carbon atoms can form diverse molecules by bonding to four other atoms Make an electron distribution diagram of carbon. It is essential that you know the answers to these questions: How many valence electrons does carbon have? How many bonds can carbon form?

AP bio summer hw ch 2 questions

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Properties of water
Substituent

AP Biology Summer Assignment Unit 2: The Chemistry of Life Ch. 2- Write the key concepts from chapter 2 (include concept number also). These are listed for you in the front of each chapter. The key concepts from chapter 2 are concept 2.1 which states, ?Matter consists of chemical elements in pure form and in combinations called compounds.? Concept 2.2 which states, ?An element?s properties depend on the structure of its atom.? Concept 2.3 which states, ?The formation and function of molecules depend on chemical bonding between atoms.? And lastly concept 2.4 which states, ?Chemical reactions make and break chemical bonds. Ch. 3- Use illustrations to describe how the structure of a water molecule allows it to form hydrogen bonds with other water molecules.

Stereo chemistry of organic compounds

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Cahn–Ingold–Prelog priority rules
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Chirality
Alkane
Stereo chemistry

Organic Chemistry Stereochemistry of Organic Compounds Dr. Anita Tandon University of Delhi Delhi -110007 CONTENTS Structural Isomers Stereoisomers Conformational Isomers Configurational Isomers (i) Optical isomers (a) Compound with one Asymmetric Carbon Atom (b) Compound with more than one Asymmetric Carbon Atom (c) Compound with no Asymmetric Carbon Atom (d) Elements of Symmetry (e) Properties of Enantiomers (f) Relative Configuration (g) Absolute Configuration (h) Fischer?s Plane Projection Diagram (i) Optical inactivity in compounds having Chiral Carbon Atom (ii) Geometrical Isomers (a) E&Z system of nomenclature (b) Properties of Geometrical Isomers

Prentice Hall AP Chem. Chapter 2 notes

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John Dalton
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ion
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Chapter 2 Atoms, Molecules, and Ions John D. Bookstaver St. Charles Community College St. Peters, MO ? 2006, Prentice Hall, Inc. Chemistry, The Central Science, 10th edition Theodore L. Brown; H. Eugene LeMay, Jr.; and Bruce E. Bursten Atomic Theory of Matter The theory that atoms are the fundamental building blocks of matter reemerged in the early 19th century, championed by John Dalton. Dalton?s Postulates Each element is composed of extremely small particles called atoms. Dalton?s Postulates All atoms of a given element are identical to one another in mass and other properties, but the atoms of one element are different from the atoms of all other elements. Dalton?s Postulates
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