If your given is in moles: Determine the molar ratio to change from moles of your original substance to moles of the desired substance If you want your.

Slides:

Advertisements

Similar presentations

STOY-KEE-AHM-EH-TREE. It‘s the study of amounts of substances that are involved in reactions.

Advertisements

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.

Calculating Percentage Composition Suppose we wish to find the percent of carbon by mass in oxalic acid – H 2 C 2 O 4. 1.First we calculate the formula.

Stoichiometry Part II. Many stoichiometry problems follow a pattern: grams(x)  moles(x)  moles(y)  grams(y) Converting Past Mole-Mole We can start.

Stoichiometry Calculating Masses of Reactants and Products.

Stoichiometry By Ellis Benjamin. Definitions I Compounds - is a pure substance that is composed of two or more elements Molecules – is a combination of.

Chapter 7: Chemical Formulas and Chemical Compounds

Mole Jeopardy Moles and Grams Avagadro!Percent Composition Empirical Formula Molecular Formula

More Stoichiometry Problems involving Volume or Particles or Energy Chapter 9 Section 1, pages 308 – 311.

Solving Stoichiometry Problems

Molar Mass & Stoichiometry A to A. What is the Molar Mass of Mg(OH) 2 ? g/mole g/mole g/mole g/mole

Moles to Grams If you are given moles but the answer must be in grams, you have a mole to mass problem. Calculate moles just like mole to mole calculations.

Moles of Compounds. A properly written compound shows the ratio of atoms in the compound. For example, sodium carbonate (Na 2 CO 3 ) shows that for every.

Drill – 2/7/11 What is the molar mass of BF 3 ? What is the molar mass of B 2 F 6 ? What is the ratio between these values?

Empirical Formula Calculations Problem: A compound is found to contain the following % by mass: 69.58% Ba 6.090% C 24.32% O What is the empirical formula?

Moles of Compounds. A properly written compound shows the ratio of atoms in the compound. For example, sodium carbonate (Na 2 CO 3 ) shows that for every.

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

The Mole & Stoichiometry!

Stoichiometry Problems. If 304g of Eu (s) are used how many moles of hydrogen gas are produced? __Eu (s)+ __HF (g)  __EuF 3 (s)+ __H 2 (g) Step 1: Balance.

Stoichiometry Chemical Quantities Chapter 9. What is stoichiometry? stoichiometry- method of determining the amounts of reactants needed to create a certain.

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

Stoichiometry Compostion Stoichiometry- Mass relationship of elements in compounds Reaction Stoichiometry- Mass relationship between reactants and products.

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.

Stoichiometry is… Greek for “measuring elements” Defined as: calculations of the quantities in chemical reactions, based on a balanced equation. There.

Stoichiometry II. REMEMBER ALL stoichiometry problems start with a ALL stoichiometry problems start with a balanced equation.

Stoichiometry MolesMass Remember! You cannot convert directly from a mass of one substance to the mass of another substance! You must always find moles.

Unit 5A Chapter 10: Chemical Quantities Mole-Mass Relationships ABClark-Grubb.

Can’t directly measure moles Measure units related to moles: –Mass (molar mass) –Number of particles (6.02 x ) –Liters of gas (22.4 Liters at STP)

Section 2: Stoichiometric Calculations Chapter 8: Quantities in Chemical Reactions.

Stoichiometry Grams – Moles Grams – Grams. What is Stoichiometry? Chemists are often responsible for designing a chemical reaction and analyzing the products.

MOLAR MASS CHAPTER 7-2.

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

Calculating Empirical Formulas

MASS - MASS STOICHIOMETRY

Starter 1/4 Identify the type of reaction and then write the balanced chemical equation for the reaction described below “aluminum oxide is heated”

Empirical Formulas.

Chemical Reactions Unit

Section 9.1 Introduction to Stoichiometry

CHAPTER 9 STOICHIOMETRY

Moles Mass There is also a connection between 1 mole of a substance and mass of any element or compound. Use Molar Mass to convert between moles & mass.

Percent Composition and Chemical Formulas

Stoichiometry Vocab Theoretical Yield: the calculated amount of product yielded by a reaction (found through stoichiometry) Actual Yield: the actual amount.

Molar Conversions Review

Section 3.2 Stoichiometry and Compound Formulas

Bell Ringer Jan. 31 N2 + 3H2  2NH3 How many moles of NH3 are created from 18 grams of H2? How many moles of N2 are needed to create 42.

Practice: 2 step mole conversions

Quick ‘cheat sheet’ If given A to find B

Stoichiometry Definition

Molar Conversions.

Unit 4 Stoichiometry Stoichiometry, mol-mol Stoich. , volume-volume

10.1 What is a Mole? A mole of any substance contains Avogadro’s number of representative particles, or 6.02  1023 representative particles. The term.

Chapter 9.1 stoichiometry –

(moles of solute per liter of solution)

Stoichiometry II.

Aim: How do chemists calculate the mass of one mole of a substance?

Fun With Molar Ratios By: Andrea Moody.

Molar Conversions.

Notes #2: Stoichiometry

9.1/9.2 Stoichiometric Calculations

Unit 8 Stoichiometry.

Add to U7-3 Warm-Ups Ca3(PO4)2 1 mol 3 mol Ca 2 mol P 8 mol O

Molecular Formula.

Combustion analysis Combustion analysis is a method used in both organic chemistry and analytical chemistry to determine the elemental composition (more.

Presentation transcript:

If your given is in moles: Determine the molar ratio to change from moles of your original substance to moles of the desired substance If you want your answer in grams: use the molar mass of the desired substance to convert from moles back to grams If you want your answer in moles: You are done! If your given is in grams: Use the molar mass of the compound to determine the number of moles Determine the molar ratio to change from moles of your original substance to moles of the desired substance If you want your answer in moles: You are done! If you want your answer in grams: use the molar mass of the desired substance to convert from moles back to grams

 Moles to Moles: Given moles A x formula moles B formula moles A  Moles to Grams: Given moles A x formula moles B x molar mass B formula moles A 1 mole B  Grams to Moles: Given grams A x 1mole A x formula mol B mol mass A formula mol A  Grams to Grams: Given grams A x 1mole A x formula mol B x mol mass B mol mass A formula mol A 1 mol B

 One question you have about making rockets using stoichiometry…