Molecular Formula. Compare mass of empirical formula to formula mass of molecule X (empirical formula) = (molecular formula)‏

Slides:

Advertisements

Similar presentations

Learning Objectives: To understand what is meant by the term, ‘relative molecular mass’

Advertisements

Section 5: Empirical and Molecular Formulas

Determining Chemical Formulas Experimentally % composition, empirical and molecular formula.

Determining a Compound’s Percentage Composition From its Formula Empirical, Molecular, & Structural Formulas Determining a Compound’s Empirical Formula.

Molecular Formulas 1.Find empirical formula 2.Calculate molar mass of empirical formula 3.Molar mass of compound / molar mass of empirical formula (we’ll.

Empirical and Molecular Formulas

Percent Composition, Empirical Formula and Molecular Formula 10.4 summary.

Percent Composition and Chemical Formulas

Molecular Formula vs Empirical Formula. Different compounds can have the same empirical formula but different molecular formulas. Empirical Formula is.

Molecular and Empirical Formulas Percentage Composition: Mass of each element compared to the mass of the compound ( m / m ) or volume of each compared.

Empirical formulas 9.0 g of water consists of 1.0 g hydrogen and 8.0 g oxygen (11.1% hydrogen and 88.9% oxygen). Any mass of water will work so select.

Chapter 11 The Mole A chemists best friend  Counting units in groups is common  Dozen  Case  Gross  Mole - a particular number of atoms, ions, molecules.

The Mole and Avogadro’s Number

CHAPTER 10 THE MOLE. The mole is a number (6.02 x ) It is a term like the term “dozen” It was chosen by chemists to make working with atomic weights.

Using the MOLE. Percentage composition Percentage composition is the mass of individual elements in a compound expressed as a percentage of the mass of.

3.10 Determining a Chemical Formula from Experimental Data

Chapter 9 Problems a, 9.18 b and 9.38 a. Citric acid with a molecular mass 192 amu Mass %: C 37.50, H 4.21 and O Determine molecular formula.

Empirical and Molecular Formulas. Caffeine is 49.48% C, 5.15% H, 28.87% N and 16.49% O. What is its empirical formula? Empirical Mass=

Percent Composition, Empirical and Molecular Formulas.

What is the formula of this compound if: A compound is: 40.1% C 6.6% H 53.3% O What is the empirical formula of this compound? What is the molecular formula.

Molar Mass & Stoichiometry. What is the Molar Mass of Mg(OH) 2 ? g/mole g/mole g/mole g/mole 5. Not listed

Empirical Formulas. Gives the lowest whole-number ratio of the elements in a compound. Example: Hydrogen Peroxide (H 2 O 2 ) Empirical Formula- HO.

Mr. Chapman Chemistry 20. Converting from grams to moles Need: Moles and Mass worksheet.

The Molecular Formula Chemistry 11 Ms. McGrath. The Molecular Formula The empirical formula CH has a molar mass of 13 g/mol. Acetylene, C 2 H 2, and benzene,

Calculating Empirical and Molecular Formulas. Calculating empirical formula A compound contains 79.80% carbon and 20.20% hydrogen. What is the empirical.

Starter  Finish the study guide from yesterday. Ch. 7B Using Chemical Formulas 7B.4 Determining Molecular Formulas.

USING MOLAR CONVERSIONS TO DETERMINE EMPIRICAL AND MOLECULAR FORMULAS.

Wake-up Determine the empirical formula for the following: 28.4% Copper and 71.6% Bromine.

 Shows the percent by mass of each element in a compound.

Percent Composition, Empirical Formula and Molecular Formula.

DETERMINING MOLECULAR FORMULAS (FOR COVALENTLY BONDED COMPOUNDS)

Percent Composition - The percent composition of a component in a compound is the percent of the total mass of the compound that is due to that component.

Percent Composition Determine the mass percentage of each element in the compound. Determine the mass percentage of each element in the compound. Mass.

Percent Composition - The percent composition of a component in a compound is the percent of the total mass of the compound that is due to that component.

Percent Composition: Is the percentage of the total mass due to each element within a compound.

And Empirical Formula.  Determine the mass percentage of each element in the compound.

FINDING EMPIRICAL AND CHEMICAL FORMULAS BY EXPERIMENT

5-6 Determining the Emprical Formula of a Compound (Sections 8.6, 8.7)

Empirical & Molecular Formulas

The Molecular Formula Chemistry 11 Ms. McGrath.

Calculating Empirical Formulas

Determine the empirical formula of the compound containing:

You need a calculator AND periodic table for today’s notes

Empirical and Molecular Formulas

Chapter 3 Composition of Substances and Solutions

EMPIRICAL FORMULA The empirical formula represents the smallest ratio of atoms present in a compound. The molecular formula gives the total number of atoms.

Empirical formula – the chemical formula of a compound written using the smallest, whole number, mole ratio between atoms in the compound. What is the.

Empirical and Molecular Formulas

BR 1/17 A hydrate is a compound with water added. When naming them we use the prefixes we used for covalent compounds. For example: CuSO4 · 5H2O is.

Molecular Formula Percent Composition.

DO NOW Pick up notes Get out homework, calculator, and periodic table.

Empirical Formula Practice

Molecular Formula Percent Composition.

TYPES OF FORMULA.

Unit 3, Lesson 9: Finding Molecular Formulae

7.5 – NOTES Molecular Formulas

Percent Composition.

Empirical Formulas Unit 5.

Vocabulary Percent Composition -

MOLECULAR FORMULA whole number multiple of the empirical formula

Empirical and Actual Formulas

Molecular Formula vs Empirical Formula.

Calculating Empirical and Molecular Formulas

Formulas/MOF Objectives

Empirical and Molecular Formulas

7.3 – NOTES Molecular Formulas

Calculating Empirical and Molecular Formulas

Molecular Formula Acetic Acid Glucose Formaldehyde.

Empirical Formulas, Hydrates, and Molecular Formulas

Presentation transcript:

Molecular Formula

Compare mass of empirical formula to formula mass of molecule X (empirical formula) = (molecular formula)‏

Sample Problem 7-14 We found the empirical formula for a compound of phosphorous and oxygen to be P 2 O 5. Experimentation shows that the molar mass of this compound is g/mole. What is the compound's molecular formula? Find mass of empirical formula:  2P: 2 ( ) =  5O: 5( ) =  Sum: g/mole

Sample Problem 7-14 Continued Compare molar mass to empirical mass:  / = 2 Write molecular formula:  P 2 O 5 x 2 = P 4 O 10