# 'Molecular formulas' diaporamas de présentation

## Stoichiometry

Stoichiometry. Study of mass and chemical amounts. 1. Compound stoichiometry 2. Reaction stoichiometry. Connecting the Macro and Atomic Scales: The Mole. Chemical macroscopic counting unit: 1 mole contains 6.022 x 10 23 particles 6.022 x 10 23 is Avogadro’s number , named after

By betty_james
(348 views)

## Making Formulas

Making Formulas. % Composition, Empirical and Molecular Formulas. Percent Composition. Percent composition of a compound refers to the percentage by mass .  In other words, the percentage composition of water shows what % (by mass) is Hydrogen, and what % is Oxygen.

By liam
(1131 views)

## VI. Alkanes A. Molecular Formulas 1. Degrees of Unsaturation 2. Constitutional Isomers B. IUPAC Nomenclatur

VI. Alkanes A. Molecular Formulas 1. Degrees of Unsaturation 2. Constitutional Isomers B. IUPAC Nomenclature C. Conformational Analysis 1. Ethane a) Newman Projections 2. Propane 3. Butane VII. Cycloalkanes A. Ring Size and Strain B. Cyclopropane

By brinda
(163 views)

## Writing Empirical and Molecular Formulas

Writing Empirical and Molecular Formulas. What is an empirical formula?. A chemical formula in which the ratio of the elements are in the lowest terms is called an empirical formula . . Example:.

By elan
(322 views)

## Chapter 3: Stoichiometry

Chapter 3: Stoichiometry. Atomic Masses. Naturally occurring chlorine has the following properties 75.78% Cl-35 (34.969 amu) 24.22% Cl-37 (36.966 amu) Calculate the average atomic mass. Avogadro’s Number. The molecular formula for aspartame is C 14 H 18 N 2 O 5. (molar mass = 294.30 g/mol)

By baruch
(224 views)

## Counting Atoms

Counting Atoms. Chemistry is a quantitative science—we need a “counting unit.”. MOLE - 1 mole is the amount of substance that contains as many particles (atoms, molecules) as there are in 12.0 g of 12C. Avogadro’s Number. 6.02214199 x 10 23.

By gefen
(229 views)

## Empirical and Molecular Formulas

Empirical and Molecular Formulas. Empirical Formula. Empirical Formula A formula that gives the simplest whole-number ratio of the atoms of each element in a compound. CH 3 O. CH 3 O. CH 3 OOCH = C 2 H 4 O 2. CH 2 O.

By wei
(204 views)

## Percent Composition

Percent Composition. Example: MgO Find molar mass of whole compound: MgO = 24.3 + 16.00 = 40.3 grams % Mg (by mass) = mass of Mg = 24.3 g x 100 = 60.3% molar mass of MgO 40.3 g

By zofia
(225 views)

## Properties of Solids

Properties of Solids. Physical properties. While solid has definite shape and volume; it does have various other properties that can be very different. Such as density, colour , melting points, etc. Pg. 119. Ionic solids. Lots found in nature as rock and mineral deposits:

By deiondre
(257 views)

## Empirical and Molecular Formulas

Empirical and Molecular Formulas. A compound contains 50.0% sulfur and 50.0% oxygen by mass. What is the empirical formula?. SO 2. A compound consists of 10.05% carbon, 0.84% hydrogen, and 89.11% chlorine. What is the empirical formula?. CHCl 3.

By bruno
(235 views)

## Periodicity

Periodicity. When one looks at the chemical properties of elements, one notices a repeating pattern of reactivities. Periodic Table. The rows on the periodic chart are periods. Columns are groups. Elements in the same group have similar chemical properties. Groups.

By lang
(103 views)

## Chapter 8: Covalent Bonding Resources: Chapter 8 of our TB and unit 6 of workbook

Chapter 8: Covalent Bonding Resources: Chapter 8 of our TB and unit 6 of workbook Ch. 8 reading and study guide (in part) Powerpoint used in class Lab practical: Molecular models Handouts: practice problems and naming of covalent/molecular compounds Animations and simulation.

By rhian
(119 views)

## Chapter 9 Chemical Bonding I: PART 2

Chapter 9 Chemical Bonding I: PART 2. Ionic Bonding Model vs. Reality. Lewis theory: attractions btwn ions are strong ionic compounds should have high MPs & BPs (breaking down crystal should require lots of E ) stronger attraction (larger lattice E), higher the MP.

By yelena
(277 views)

## The Mole Concept

The Mole Concept. Review: Avogadro’s Number. Avogadro’s Number (symbol N) is named in honor of Italian chemist Amadeo Avogadro It tells us the number of atoms in 1 mole of a substance The value of Avogadro’s number is 6.02x10 23. Review: Mole.

By lionel
(256 views)

## Measurement of Matter: The Mole

Measurement of Matter: The Mole. How do you measure matter? What are the three different ways we Can measure things? count mass volume. CONVERSIONS. A pair Equals A dozen equals 1 minute equals how many seconds? 1 hour equals how many minutes. 2 12 60 60.

By donal
(283 views)

## Chemical Formulas

Chemical Formulas. The subscript to the right of the symbol of an element tells the number of atoms of that element in one molecule of the compound. Types of Formulas. Empirical formulas give the lowest whole-number ratio of atoms of each element in a compound .

By jera
(119 views)

## Chemical Quantities

Chemical Quantities. Chapter 7. Avogadro’s Number. How do we count atoms? Dozens? Reams? . 1.0079 amu = 1 atom hydrogen 40.078 amu = 1 atom calcium 55.847 amu = 1 atom iron 1.0079 g H = ???? Hydrogen atoms 40.078 g Ca = ??? Calcium atoms 55.847 g Fe = ??? Iron atoms. Mole.

By bliss
(200 views)

## What is a Mole?

What is a Mole?. A mole of a substance is 6.02 x 10 23 representative particles of that substance. The number of particles in a mole ( 6.02 x 10 23 ) is called Avogadro’s number . The Mass of a Mole of an Element. The mass of a mole of an element is its molar mass . .

By prentice
(108 views)

## Alkanes & Isomers

Alkanes & Isomers. Alkanes. Remember: 1) saturated- all single covalent bonds and carbon bonded to 4 atoms 2) CnH2n+2. Straight chain alkanes. All carbons in a row Which is the straight chain form of butane?. Branched-chain alkanes. All the carbons are not in a row.

By raina
(139 views)

## Unit 3 A.7 Modeling Alkanes

Unit 3 A.7 Modeling Alkanes. http:// www.youtube.com/watch?v=Sfm3eHe57PU Pg.224 Questions 1-10 pg.228. A.9 Alkanes. Straight-chain alkanes – each carbon atom is only linked to one or two other carbon atoms

By norman
(146 views)

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