'3 al 2' diaporamas de présentation

??? ??????? synthetic resin and Plastics

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Chapter 4 Compounds and Their Bonds

Chapter 4 Compounds and Their Bonds. 4.1 Valence Electrons 4.2 Octet Rule and Ions. Valence Electrons. The valence electrons are the electrons in the outer shell.

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Energy Relationships in Chemical Reactions

Energy Relationships in Chemical Reactions. Energy is the capacity to do work Thermal/kinetic energy is the energy associated with the random motion of atoms and molecules Chemical Potential energy is the energy stored within the bonds of chemical substances.

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10 pt

Rxn Types. Rxn Types. Acids, Bases or Salts. Equations. Symbols in Equations. 5 pt. 5 pt. 5 pt. 5 pt. 5 pt. 10 pt. 10 pt. 10 pt. 10 pt. 10 pt. 15 pt. 15 pt. 15 pt. 15 pt. 15 pt. 20 pt. 20 pt. 20 pt. 20 pt. 20 pt. 25 pt. 25 pt. 25 pt. 25 pt. 25 pt.

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Classifying Chemical Reactions

Classifying Chemical Reactions. Chemistry. Classifying Chemical reactions. Essential Questions Is there a way to organize chemical reactions to make them easier to understand? And maybe easier to balance?. Types of Reactions. We classify reactions to make predicting the products easier

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Mixtures

Mixtures. Mixtures are physical (NOT chemical) combinations Many mixtures have NO chemical reaction potential Sugar or Salt dissolved in water Solder, a mixture of Tin and Lead Unlimited number of potential combinations Some mixtures have chemical reaction potential

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Chapter 4 Compounds and Their Bonds

Chapter 4 Compounds and Their Bonds. 4.1 Valence Electrons 4.2 Octet Rule and Ions. Valence Electrons. The valence electrons are the electrons in the outer shell.

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????? p ???

????? p ???. Chapter 21 p -metal. ?21? P ???. 3?? ????? 1????????????????????????? 2???????????????????????? 3????????????. 21?1 p ?????. ?????? A. p ??? ???? ????. ??? ?A. ??? ?A. 21?1 p ?????. ???: ns 2 np 1 (ns np nd ?9?). ??????1, 3. ?????? A. ???: ns 2 np 2

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Synthesis gas from Biomass in Millisecond Reactors

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Balancing Reactions

Balancing Reactions. Balancing Reactions. Choose the largest compound Make its coefficient 1 Choose any element in that compound that appears in only 1 other location. Balance that element with coefficients where that element appears Repeat until all elements are balanced

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Mass Relationships in Chemical Reactions

Mass Relationships in Chemical Reactions. Chapter 3. 100. Natural lithium is: 7.42% 6 Li (6.015 amu) 92.58% 7 Li (7.016 amu). Average atomic mass of lithium:. = _______ amu. 3.1. Dozen = 12. Pair = 2. The mole (mol) is the amount of a substance that

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Contents

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Chemical Reactions

Chemical Reactions. You should be able to Classify reactions by type. Write a balanced molecular equation, complete ionic equation, and a net ionic equation. Balance oxidation-reduction reactions. Predict if a precipitate will form using the solubility rules.

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"Things turn out best for those who make the best of the way things turn out." Jack Buck

"Things turn out best for those who make the best of the way things turn out." Jack Buck. CHEMICAL EQUATIONS IN CHEMISTRY, WE ARE CONTINUALLY CONCERNED WITH CHEMICAL REACTIONS – COMBINING DIFFERENT SUBSTANCES TO MAKE A NEW POLYMER OR A NEW MEDICINE OR COMBUSTING A FUEL TO GENERATE ENERGY.

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Chemical Reactions

Chemical Reactions. Chemical Reactions :. Chemical Changes involve a re-arrangement of atoms producing new substances with new properties. A chemical change cannot easily be reversed. A physical change does not produce a new substance and can be easily reversed

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Stoichiometry

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During chemical changes matter cannot be created or destroyed. It is merely rearranged. Example

Balancing Equations. O atom. H atom. During chemical changes matter cannot be created or destroyed. It is merely rearranged. Example hydrogen + oxygen =====> water 2 H 2 + O 2 ====> 2 H 2 O. Notice there are the same number and kinds of atoms on both sides of the equation.

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What are the coefficients that will balance the following equation?

1. What are the coefficients that will balance the following equation? Rb + RbNO 3 --> Rb 2 O + N 2. A. 10,1,6,1. B. 2,2,3,1. C. 1,2,6,1. D. 10,2,6,1. 2. What are the coefficients that will balance the equation below?

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Molecular Notation and Chemical Equations

8 th Grade Science Mrs. Sassaman All images are from www.Chem4kids.com. Molecular Notation and Chemical Equations. Molecular Notation. Chemical symbol for Hydrogen. Chemical symbol for Oxygen. H 2 O. No number mean 1 atom of Oxygen. Means 2 atoms of Hydrogen. 3 total atoms.

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2 F 2 + 4 NaOH ? 4 NaF + O 2 + 2 H 2 O

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