 Molar mass is the mass in grams of one mole of particles (atoms, ions, molecules, formula units).  Equal to the numerical value of the average atomic.

Slides:

Advertisements

Similar presentations

Rice Lab Count out 1 dozen grains of rice and place in container.

Advertisements

7.3. Formula Mass – for any molecule, formula unit, or ion, it is the ____ of the ________ masses of all atoms represented in its formula. H 2 O for example.

Chapter 8 Chemical Composition Chemistry B2A. Atomic mass unit (amu) = × g Atomic Weight Atoms are so tiny. We use a new unit of mass:

The Mole: A Shortcut for Chemists S-C-8-1_The Mole Presentation Source:

I can calculate the molar mass of a compound Sometimes the molar mass is called the formula mass!

The Mole Chapter 9 What is a mole? A mole of a substance is the amount of that substance which contains 6 x particles of that substance.

IIIIIIIV Unit 5 – The Mole I. Molar Conversions. Molar Conversions n Molar Mass is a conversion factor to convert mass of any element or compound to moles.

7.3 Using Chemical Formulas  Review  Mole: SI unit for the amount of a substance (contains avogadro’s number of particles)  Avogadro’s Number:

The Mole Concept Avagadro’s Number = x 1023 Objectives:

(4.3) The Mole and Molar Mass. THE MOLE IS THE SI UNIT FOR AMOUNT OF A SUBSTANCE. the mole represents 6.02 x particles. used for small particles.

Matter Unit.  A unit created to describe atoms because the gram and kilogram are too large to use to define an atom.  1amu = 1.66 x g  g.

Wednesday, March 19 th : “A” Day Thursday, March 20 th : “B” Day Agenda  Collect Homework: pg. 21/22 practice worksheet  Continue Section 7.1: “Avogadro’s.

Molar Mass.  The Mass of 1 mole (in grams)  Equal to the numerical value of the average atomic mass (get from periodic table) 1 mole of C atoms= 12.0.

Chapter 7: Chemical Formulas and Chemical Compounds

Unit 6: Chemical Quantities

Chem Catalyst - What is the atomic mass of: - Cl? - Fe? - KCl? - H 2 O?

The Mole: A Measurement of Matter

Molar Mass and Molar Conversions Chapter 3 part III.

Molar Mass = mass in grams of one mole –Units grams/mole For elements, molar mass = atomic mass Why aren’t all atomic masses whole numbers? –Remember that.

AP Notes Chapter 7 Mole Representative Particles Molecular Mass (mm) - gam used for atoms - gmm used for molecules - gfm used for formula units MoleVolume.

Molar Mass  The Mass of 1 mole (in grams)  Equal to the numerical value of the average atomic mass (get from periodic table) 1 mole of C atoms= 12.0.

Section 7.3 – Using Chemical Formulas

Moles Notes. 1. Atomic Mass Unit amu – atomic mass unit, used to describe the mass of an atom Conversion factor: 1 amu = 1.66 x g Equivalence statement:

Molar Mass & Percent Composition. The mass of 1 mole of an element or compound – The mass in grams from the Periodic Table Unit = grams per mole (g/mol)

Quantities in Chemistry The Mole and Molar Mass. Mole Review A Mole is a unit of measurement in chemistry. It represents 6.02 x of an entity. One.

Molar Mass of ionic compounds. Molar Mass Molar mass- same as atomic mass but for a compound rather than an atom. To determine the molar mass of any compound.

Chapter 10 The Mole. The atomic mass is found by checking the periodic table. The atomic mass is the number of grams of an element that is numerically.

Stoichiometry The mathematics of Chemistry. What is Stoichiometry? The proportional relationship between two or more substances during a chemical reaction.

Mole (symbolized mol) = 6.02 x particles (602,000,000,000,000,000,000,000) Avogadro’s Number (N A ) molar mass – mass (usually in grams) of one mole.

Chemical Calculations Mole to Mass, Mass to Moles.

Unit 8 Moles & Percent Composition Chapter 10. Words representing Numbers Dozen12 Baker’s Dozen13 Gross144 Ream500 Mole6.02 x

The Mole Mole Calculations. Molar Mass mass of one mole of a substance units: grams/mole equal to the ATOMIC MASS of the element, rounded to two numbers.

Moles COUNTING BY WEIGHING. Moles (is abbreviated: mol)  It is an amount, defined as the number of carbon atoms in exactly 12 grams of carbon-12.  1.

Understanding the mole is critical for your future success in chemistry as it is used in most chemical calculations. The Mole Chemistry 8(A)

Formula (Molar) Mass Li Mn K. Formula (Molar) Mass Add atomic mass of each atom in formula Unit: g/mol Mass of one mole of a pure substance.

Mole Calculations I.Molar Mass II. Percent Composition III. Converting Mass to Moles IV. Converting Moles to Mass.

 Molar Mass. ATOMIC MASS  Mass of an atom in atomic mass units (amu)  Ex: Carbon = amu  Molecular mass—sum of atomic masses (in amu) in the.

Chapter 8 Factor Label Method and the Mole. What is Avogadro’s Favorite Novel?

The Mole. What is the a mole? A unit to measure the amount of a substance. Commonly abbreviated mol. The symbol is n.

 How do we use these?  These indicate which of the elements make up a substance.  These also indicate the number of ions or atoms that make up a given.

UNIT 5A Chapter 10: Chemical Quantities Molar Mass ABClark-Grubb.

Stoichiometry and the Mole (Part 2) Converting—Particles and Grams.

Objective: To reintroduce the mole and introduce two mole conversions Do Now: Solve each proportion = x2. 10 = x.

MOLAR MASS Molar mass of a substance = mass in grams of one mole of the substance. A compound’s molar mass is NUMERICALLY equal to its formula mass. Formula.

Stoichiometry and the Mole (Part 1) Formula Mass and Molar Mass.

Avogadro’s Number and Molar Conversions Mole: the SI base unit used to measure the amount of a substance whose number of particles is the same as the number.

SOL R EVIEW 5 The Mole A M OLE OF P ARTICLES A M OLE OF P ARTICLES C ONTAINS 6.02 X PARTICLES = 6.02 x C atoms = 6.02 x H 2 O molecules.

Suppose we invented a new collection unit called a rapp. One rapp contains 8 objects. 1. How many paper clips in 1 rapp? a) 1b) 4c) 8 2. How many oranges.

MOLAR MASS CHAPTER 7-2.

MASS and MOLES Page 57 of INB.

Bell Ringer How many moles of Nitric acid are there in 250 g?

Chemical Formulas: Formula Mass & Molar Mass

How many ions are in a mole of chloride, Cl- ?

Molar Mass Calculation

Chapter 7 – Chemical Formulas and Chemical Compounds

The Mass of a Mole of an Element

Chapter 8 The Mole.

Section 3.1 The Mole and Molar Mass

Avogadro’s number, the mole, molarity, molar mass

Molar Conversions.

Calculation Of Molar Mass

A NEW UNIT OF MEASURMENT THE MOLE

The Mole: A Shortcut for Chemists

Molar Conversions.

The Mass of a Mole of an Element and a Compound

Chemical Composition.

Presentation transcript:

 Molar mass is the mass in grams of one mole of particles (atoms, ions, molecules, formula units).  Equal to the numerical value of the average atomic mass (get from periodic table) 1 mole of C atoms= 12.0 g 1 mole of Mg atoms =24.3 g 1 mole of Cu atoms =63.5 g  So, Molar Mass is the atomic mass expressed in units grams/mole (g/mol)

Chlorine has an atomic mass of amu. So what is its molar mass? grams per mole The number is the same, just change the unit.

 How do we find the molar mass of a compound?  Find the molar mass of each element in the compound  Determine how many of each element are in the compound.  Multiply the number of each element by its molar mass.  Add these mumbers.

In one mole of Aluminum Bromide, there is 1 mole of aluminum atoms and 3 moles of bromine atoms. Aluminum Bromide AlBr 3

 To find the molar mass of AlBr 3, we do the following: 1 mol Al x g/mol Al = g Al 3 mol Br x g/mol Br = g Br g Al g Br = g AlBr 3 per mole or g/mol AlBr 3

Where, n is the # of moles (mol) m is the mass (g) M is the molar mass (g/mol)

 What is the mass of 4.72 x formula units of chromium (III) iodide?