Molar Mass and Percent Composition

Slides:

Advertisements

Similar presentations

Molar Mass of Compounds

Advertisements

7.3 USING CHEMICAL FORMULAS APRIL 27, USING CHEMICAL FORMULAS Formula Masses: Sum of all the average atomic masses of all atoms represented.

Calculating Moles and Number of Atoms

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

Percent Composition, Empirical Formulas, Molecular Formulas

Calculating Percent Composition Mrs. Page 10 th Chemistry.

Percent Composition. What is Percent Composition?  The percent composition by mass of a compound represents the percent that each element in a compound.

PERCENT COMPOSITION. WHAT IS PERCENT COMPOSITION BY MASS? a quantitative measure of what a compound or mixture is made of it tells us how much of each.

Warm-Up: To be turned in 3.6 mol NaNO 3 = ______ g g MgCl 2 = ______ mol.

The Mole and Chemical Composition

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 and Molecular Formulas

The Mole and Chemical Composition

Chapter 7: Chemical Formulas and Chemical Compounds

Chemical Formulas and Moles. Example: 1.water (C) – every molecule of water contains 2 atoms of hydrogen & one atom of oxygen - 2 molecules of H 2 O would.

Percentage Percentage means ‘out of 100’

Empirical formula & Percentage Composition Find the empirical formula of a compound given its % composition Find the molecular formula given empirical.

Calculating Percent Composition From Formula % Composition: % by mass of each element in compound % Composition: % by mass of each element in compound.

Percent Composition. What is it? The percent composition by mass of a compound represents the percent that each element in a compound contributes to the.

Empirical Formula vs. Molecular Formula Empirical formula: the formula for a compound with the smallest whole-number mole ratio of the elements Molecular.

Percentage Composition

Percent Composition Percent by mass of an element in a compound.

Empirical & Molecular Formulas. Percent Composition Def – the percent by mass of each element in a compound Percent by mass = mass of element x 100 mass.

Aim: How to calculate Percent Composition  DO NOW: 1. What is the number of moles of potassium chloride present in 148 g? 2. What is the molar mass of.

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

7.3 Percent composition and chemical formulas. Percent composition The relative amount of mass of each element in a compound, expressed in %

Molar Mass, Moles, and Molecules 7.3 Using Chemical Formulas.

Percent Composition. What is it? Percent composition is the percent by mass of each element present in a compound.

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.  We go to school for 180 days a year. What % of the year are we in school? Similar to finding % in any other situation.

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. WHAT IS PERCENT COMPOSITION BY MASS? a quantitative measure of what a compound or mixture is made of it tells us how much of each.

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. Percent Composition by Mass – If you want to know what percentage of a compounds’ mass is contributed to by each element present.

Percent Composition. – Compounds are ALWAYS composed of elements in fixed ratios. This is often referred to as the Law of Definite Proportions. – This.

MOLAR MASS CHAPTER 7-2.

Percent Composition.

Aim: How do I calculate Percent Composition?

AP CHEMISTRY NOTES Ch 3 Stoichiometry.

Glencoe: Chapter 11 Sections 11.1 & 11.2

Calc.: Gram Formula Mass

Aim: How to calculate Percent Composition

Percent Composition & Empirical and Molecular Formulas

Empirical Formulas.

Chapter 7 – Chemical Formulas and Chemical Compounds

The Mass of a Mole of an Element

Chapter 8 The Mole.

Simplest Chemical formula for a compound

Percentage Composition

Percent Composition and Chemical Formulas

Molar Conversions.

Percent Composition.

Percent Composition.

Chapter 6 Chemical Composition.

Percent Composition.

Calculation Of Molar Mass

Molar Mass and Percent Composition

Chemical Composition Mole (mol) – The number equal to the number of carbon atoms in grams of carbon. Avogadro’s number – The number of atoms in exactly.

Molar Conversions.

Percentage Composition

Percentage Composition

Percent Composition.

Empirical Formula of a Compound

The Mass of a Mole of an Element and a Compound

Formulas/MOF Objectives

Empirical and Molecular Formulae

Percentage Composition

Molecular Formula.

Notes Ch. 10.3a Calculating Percent Composition

III. Percent Composition

Presentation transcript:

Molar Mass and Percent Composition

Molar Mass Mass of 1 mol of a substance 128.21g NiF2 =_______ mol On Periodic Table for elements Must calculate for compounds 128.21g NiF2 =_______ mol

59.49g (NH4)2HPO3=_______formula units

Hydrates—solids that contain a fixed number of H2O molecules as part of their structure 3.10 x 1023 formula units Na2(CO3)∙10H2O =____ g

% Composition Gives the % of each element in a compound. Average atomic mass of element divided by molar mass of compound and then multiplied by 100. Make sure you keep track of how many of each element you have All percentages need to add to 100%

NiF2