Tuesday, May 13 th : “A” Day Wednesday, May 14 th : “B” Day Agenda  Chapter 7 Review Review  Chapter 7 Jeopardy Review Next time: Concept Review due Concept Review due Chapter 7 Test Chapter 7 Test

Chapter 7 Review 2. What term is used to describe the mass in grams of 1 mol of a substance? Molar Mass

Chapter 7 Review 35. How many atoms of gold are there in a pure gold ring with a mass of 10.6 g? 10.6 g Au X 1 mole Au =.0538 moles Au g Au g Au.0538 moles Au X X atoms Au 1 mole Au 1 mole Au 3.24 x atoms Au

Chapter 7 Review 45. Find the molar mass of the following compounds: c)Potassium dichromate K 1+ Cr 2 O 7 2- K 2 Cr 2 O 7 K: 2(39.10) = Cr: 2(52.00) = O: 7(16.00) = g/mol g/mol

Chapter 7 Review 45. Find the molar mass of the following compounds: d)Magnesium nitrate Mg 2+ NO 3 1- Mg(NO 3 ) 2 Mg(NO 3 ) 2 Mg: = N: 2(14.01) = O: 6(16.00) = g/mol g/mol

Chapter 7 Review 50. A n oxide of phosphorus is 56.34% phosphorus, and the rest is oxygen. Calculate the empirical formula for this compound g P X 1 mol P = mol P = 1 mol P (2) g P mol P g O X 1 mol O = mol O = 1.5 mol O (2) g O mol O P2O3

Chapter 7 Review 51. The empirical formula of the anticancer drug altretamine is C 3 H 6 N 2. The experimental molar mass is 210 g/mol. What is the molecular formula? C: 3(12.01) = = 3 +H: 6(1.01) = N: 2(14.01) = g/mol g/mol 3(C 3 H 6 N 2 ) = C 9 H 18 N 6 3(C 3 H 6 N 2 ) = C 9 H 18 N 6

Jeopardy Teams 2A Team #1: Megan, Chris, Emily, Taylor, Jordan Team #2: Connor, Colleen, Ben, Desiree, Rachael Team #3: Paityn, Zendra, Jake, Ashley, Tabitha Team #4: Austin, Drew, Krits, Lauren, Allie Team #5: Stephanie, Jackie, Lydia, Brooke, Mya

Jeopardy Teams 4A Team #1: Troy, Cody, Anna, Daleah Team #2: Jordan, Rebecca, Abby Team #3: Josh, Ashley, Sarah Team #4: Morgan, Eric, Brook Team #5: Tate, Mason, Korey

Jeopardy Teams 1B Team #1: Autumn, Ashley, Kyle, Morgon Team #2: Christian, Allie, Hunter, Kelsey Team #3: Alyssa, Andy, Rachel M., Krysta Team #4: Phoenix, Emily, Mason, Whitney Team #5: Rachel D., Sydney, Michael

Jeopardy Teams 3B Team #1: Kellie, RJ, Tom, Allysa Team #2: Merik, Danika, Michelle, Holly Team #3: Kenzie, Justin, Adam, Kaitlyn Team #4: Hunter, Molly, Eryn, Noah Team #5: Shelby, Dylan, Alexandra

Chapter 7 “The Mole & Chemical Composition”

THE RULES: There will be 5 teams Mrs. Elfline’s decisions are final – that means no whining! Each member of the winning team will receive $1 mole money

And now…here is the host of Jeopardy… Mrs. Elfline

Let’s Get Ready to play… Today’s Categories are:

Definitions

This ‘n That This ‘n That

Calculations

Rebus Puzzles Rebus Puzzles

$100 $200 $300 $400 $500 Definitions $100 $200 $300 $400 $500 This ‘n That This ‘n That $100 $200 $300 $400 $500 Calculations $100 $200 $300 $400 $500 Calculations $100 $200 $300 $400 $500 Rebus Puzzles Rebus Puzzles FJ

The number of atoms in 1 mole of any pure substance Answer…

Avogadro’s Number OR X

The unit for molar mass Answer…

g/mole OR grams per mole 200

What 2 things does a chemical formula tell you? Answer…

1. What elements are in a compound 2. How many atoms of each element are in a compound 300

A formula that shows the simplest whole-number ratio of the atoms in a compound Answer…

Empirical Formula 400

What are isotopes? What are isotopes? Answer…

Atoms of the same element that have different number of neutrons. 500

Answer… Which has more atoms: 1 mole of gold or 1 mole of silver? 1 mole of gold or 1 mole of silver?

100 They both have the same number of atoms, X 10 23

Answer… How many hydrogen atoms are there in 1 molecule of ammonium carbonate, (NH 4 ) 2 CO 3 ?

8 200

To find the molecular formula from the empirical formula, you need to calculate… Answer…

The Molar Mass of the Empirical Formula 300

As the atomic masses of the elements in the periodic table decreases, the number of atoms in one mole of the element… Answer…

Stays the same 1 mole = X atoms of ANY element 400

If a compound has a molecular formula of X 2 Y 4, what is it’s empirical formula? Answer…

XY 2 500

How many atoms are present in 2.5 moles of aluminum, Al? Answer…

1.5 X atoms Al 100

How many moles of gold are present in 150 grams of Au? Answer…

.76 moles Au 200

A compounds empirical formula is BH 3. If the experimental molar mass is g/mole, what is the molecular formula? Answer…

B2H6B2H6B2H6B2H6 300

What is the percentage composition of HCl? Answer…

2.77 % Hydrogen % Chlorine 400

Calculate the molar mass of calcium nitrate, Ca(NO 3 ) 2. Answer…

g/mole 500

Calculate the molar mass of titanium(IV) oxide, TiO 2. Answer…

79.87 g/mole 100

What is the mass (in grams) of moles of sodium, Na? Answer…

128.7 grams Na 200

Calculate the average atomic mass of rubidium if 72.17% of its atoms have a mass of amu and 27.83% of its atoms have a mass of amu. Answer…

85.47 amu 300

What is the percentage composition of quartz, SiO 2 ? Answer…

46.75 % Si % O 400

What is the empirical formula for a compound that is % calcium, % sulfur, and % oxygen? Answer…

CaSO 3 500

Answer…

Scrambled Eggs 100

Answer…

Forgive and forget (4 give/ 4 get) 200

Answer…

No U turn 300

Answer…

Diamond in the rough 400

Answer…

Missing you (U) 500

Daily Double How much do you want to wager? Daily Double Daily Double

FINAL JEOPARDY

CATEGORY: Rebus Puzzles How much do you want to wager? Proceed…

You are full of baloney! (below knee) Proceed…

Thanks for PLAYING!