Topic: Formula Mass Write the chemical formula based on the structural formula below C2H6O2C2H6O2.

Slides:

Advertisements

Similar presentations

Molar Mass of Compounds

Advertisements

Empirical and Molecular Formulas

Calculate the Empirical Formula for a compound with the following composition: 46.16% carbon; 53.84% nitrogen 1)Change % to grams (if needed) 2)Convert.

Empirical & Molecular Formulas. Empirical Formula: gives the smallest whole number ratio of atoms in a compound (completely simplified) For IONIC COMPOUNDS.

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

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

Molar Mass. Molecular Mass The molecular mass of a substance is the mass in atomic mass units (amu) of all the atoms in a given molecule. It is more commonly.

1 Chapter 7 Chemical Quantities 7.1 Atomic Mass and Formula Mass Copyright © 2005 by Pearson Education, Inc. Publishing as Benjamin Cummings.

Atomic Structure. Subatomic Particles (Particles that make up an atom) ● Proton (p+) - Positively charged - Found in the nucleus - Large mass ●Neutron.

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

Formula Mass and Composition of Compounds

The Mole and Chemical Composition

The Mole and Chemical Composition

Unit 10 – The Mole Essential Questions:

The Mole Theory Molar Mass. Mass of a Mole o Molar Mass- the mass of a mole of any element or compound (in grams) o Also called: o Formula mass – sum.

Unit 6: Chemical Quantities

8 | 1 CHAPTER 8 CHEMICAL COMPOSITION. 8 | 2 Atomic Masses Balanced equations tell us the relative numbers of molecules of reactants and products. C +

 Dalton used the percentages of elements in compounds and the chemical formulas to deduce the relative masses of atoms  Unit is the amu(atomic mass.

Chapter 10 The Mole. Chemical Measurements Atomic Mass Units (amu) – The mass of 1 atom – 1 oxygen atom has a mass of 16 amu Formula Mass (amu or fu)

Unit 6: Chemical Quantities

Section 10.3 Percent Composition and Chemical Formulas.

 The weighted average of its naturally occurring isotopes. Chemical Name Atomic # Chemical Symbol Atomic Mass (Average Atomic Mass)

Molar Mass.  A compound is a collection of bonded together. Ethanol, CH 3 CH 2 OH, is made up of : carbon atoms, hydrogen atoms, and oxygen atom, 2 6.

Percent Composition, Empirical and Molecular Formulas.

Chapter 8 Chemical Composition Chemistry 101. Atomic mass unit (amu) = × g Atomic Weight Atoms are so tiny. We use a new unit of mass:

Chemical Formulas: Formula Mass & Molar Mass. Subscripts in Chemical Formulas subscripts show # atoms of each element subscripts show # atoms of each.

Section 2: Formula Mass Chapter 7: Chemical Composition.

Average Atomic Mass. Relative Atomic Masses  Masses of atoms (in grams) are very small, so for convenience we use relative masses.  Carbon-12 is our.

Chemical Formulas: The Basics. Subscripts in Chemical Formulas numbers inside formulas numbers inside formulas lowered below line of type lowered below.

Empirical and Molecular Formulas. Formulas  molecular formula = (empirical formula) n  molecular formula = C 6 H 6 = (CH) 6  empirical formula = CH.

Topic 3 The Mathematics of Formulas and Equations

Section 12.2: Using Moles (part 3). Mass Percent Steps: 1) Calculate mass of each element 2) Calculate total mass 3) Divide mass of element/ mass of compound.

The Mole. Relative atomic mass Relative atomic mass is a weighted average of all the naturally occurring isotopes of an element. The standard upon which.

Empirical Formulas from Percents and Mass. Empirical Formula Definition: A formula that shows the simplest whole-number ratio of the atoms in a compound.

Warm Up: Jan. 5 th –This is Ch. 7.4 notes –Give the oxidation numbers for the following atoms 1.NaPO 4 2.HClO 3 3.C 6 H 12 O 6.

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

  Proportion or ratio of each element in a chemical compound  Percentage by mass of an element in a particular substance  Expressed as grams of element.

Percent Composition, Empirical and Molecular Formulas Courtesy

1 dozen =12 1 gross =144 1 ream =500 1 mole = 6.02 x (Avogadro’s Number) A mole is a Very large Number.

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.

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 Mass, Empirical and Molecular Formulas. Calculating Formula (Molar) Mass Calculate the formula mass of magnesium carbonate, MgCO g +

Pick Up a Packet & Calculator Write Down EQ Molar Mass EQ: How is molar mass calculated?

Percent Composition.

AP CHEMISTRY NOTES Ch 3 Stoichiometry.

Formula Mass of Compounds

Calc.: Gram Formula Mass

Calculating Empirical Formulas

Chemical Formulas: Formula Mass & Molar Mass

Empirical Formulas.

Chemical Formulas: Formula Mass & Molar Mass

Simplest Chemical formula for a compound

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

Percent Composition and Chemical Formulas

Chemical Formulas & Formula Mass

Topic: Chemical Formulas

Chapter 6 Chemical Composition.

Calculation Of Molar Mass

Ch. 7: Chemical Formulas and Compounds

Empirical and Molecular Formulas

The Mole Chap. 11 No, not that mole!.

The Mass of a Mole of an Element and a Compound

Ch. 7: Chemical Formulas and Compounds

C2H6 CH3 B. Empirical Formula

III. Formula Calculations (p )

WUP#21 Which is an empirical formula (E.F.) and which is a molecular formula(M.F.)? 1. H2O 2. C4H10 3. CO2 4. CH2O 5. C6H12O6.

PERCENT COMPOSITION used to determine the formula of a compound

Notes Ch. 10.3a Calculating Percent Composition

Chemical Formulas: The Basics

Presentation transcript:

Topic: Formula Mass Write the chemical formula based on the structural formula below C2H6O2C2H6O2

Formula mass of an element formula mass of element = to atomic mass –But units change from amu to grams

Formula mass of elements (p.1 in packet) Zinc: –atomic mass of amu so formula mass = 65grams Nitrogen: –atomic mass of amu so formula mass = 14 grams Neon: –atomic mass of amu so formula mass = 20 grams

Formula Mass of Compounds = sum of masses of atoms in formula Round atomic masses to whole number Step 1 count atoms Step 2 look up mass Step 3 multiply Step 3 add Ex: H 2 O H = 2 O = 1 x 1 x 16 = 2 = g

Formula Mass of Compounds Try CH 4 C = 1 X 12 = 12 H = 4 X 1 = 4 Sum = 16 g

Formula Mass for Al(NO 3 ) 3 Al(NO 3 ) 3 Al = 1 N = 1 X 3 = 3 O = 3 X 3 = 9 Al = 1 x 27 = 27 N = 3 x 14 = 42 O = 9 x 16 = g