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Chem Catalyst: Homework: ① None Late work not accepted. Don’t ask TABLE OF CONTENTS: Unit 6: Gas Laws (Write on T of C) 7L – Inquiry Station Lab: Gases 7R – Vocab to Know TABLE OF CONTENTS: Unit 6: Gas Laws (Write on T of C) 7L – Inquiry Station Lab: Gases 7R – Vocab to Know Quickly draw what you think is inside this balloon. Are they moving in a specific direction?
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Honors Agenda 1.Vocab Table 2.Begin, Mini-Lab when done. 3.Concept Bubble Map using as much vocab words as possible.
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Chem Catalyst: Homework: ① Study Guide #1-4, and 20. Late work not accepted. Don’t ask TABLE OF CONTENTS: Using your vocab table, write the difference between heat and temperature? Turn in Test Corrections if done. Parent Letters, Glue Sticks, $1 Notebook. Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations
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Gases 1.Experience almost no attractive forces. 2.Easily compressible (can be easily “squished”) 3. Gases have mass.
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Gases 4. The distance between gas particles is much greater than the distance between particles of a liquid or solid. 5. Applying pressure to a gas compresses (pushes) particles closer together. 6. Unlike solids and liquids, gases completely fill their containers. 7. Gases have high kinetic energy because their particles move more than particles in a solid or liquid. Kinetic energy is energy due to motion. 8. Gas temperature is measured in Kelvin. Temp measures the average kinetic energy of gas particles in an object.
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Kinetic Molecular Theory! Gas particles are TINY compared to the space between them. So, we do not count the volume of the particles. Itty-bitty Itty-bity Space between = BIG
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KMT continued The particles are in constant RANDOM motion. The particles collide with the walls of the container. These collisions result in pressure. Exerts pressure
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More KMT! The gas particles do not attract or repel each other. They move randomly. The average kinetic energy of the gas is proportional to the Kelvin temperature. Kinetic Energy Temperature
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Honors: Why use Kelvin? Gases exist at temperatures lower than 0°C. It doesn’t make sense for gases to move at negative temperatures. So Kelvin was created where 0K is absolute zero, the lowest temperature that can exist, where molecular motion stops.
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K = °C + 273 1.Convert room temperature (20°C) to Kelvin. 2.Convert standard temperature (0°C) to Kelvin. 3.Convert 254 K to Celsius. 4.Convert 40°C to Kelvin. 5.Convert 300 K to Celsius.
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Pressure Caused by gases colliding with container. Units include –1 atmosphere = 1 Torr = 760 mmHg = 101kPa
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Convert 3 atm into mmHg?
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Volume Usually in liters. Honors, Memorize: 1L = 1 dm 3
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Standard Temp and Pressure Reference to common conditions of a gas at 0°C (273K) and 1 atm.
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Honors: Effusion and Diffusion Effusion: rate at which a gas escapes through a small opening in a container Diffusion: rate at which a gas travels across a room/container from high to low concentration.
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You’ve Seen Diffusion Before!
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Gas Laws Shows relationships between Pressure, Temperature, Volume, and moles of gas particles. There are FOUR laws to understand. Formulas will be given to you.
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Quickwrite #1: What do you notice? Bullet points are fine.
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Boyle’s Law Has NOTHING to do with temperature! Shows the relationship b/w pressure and volume of a gas when moles and temperature are constant. Demo 1: Sit on Balloon Demo 2: Marshmallow in Syringe Pressure Volume (inversely proportional) Formula: P 1 V 1 = P 2 V 2 1= before 2= after
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V and P are inversely proportional! As one goes up the other goes down! Graph of Boyle’s Law
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Example 1 A balloon has an initial volume of 1L and pressure at 1 atm. When you sat on the balloon, its volume decreased to 0.5L. What is the pressure inside the balloon after you sat on it? By decreasing volume, we should get a higher or lower pressure according to Boyle’s Law? Does the answer make sense?
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Practice Problems 1.A gas has a volume 2.0 L and a pressure of 1.0 atm, what volume will the gas have at 4.0 atm? At constant temperature. 2.A gas has a volume 3 L and a pressure of 2.0 atm, what pressure will the gas have at 24 L? At constant temperature. 3.A gas has a volume 50.0 L and a pressure of 8.0 atm, what volume will the gas have at 10.0 atm? 4.A gas has a volume 20.0 L and a pressure of 5.0 atm, what pressure in mmHg will the gas have at 25.0 L?
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Fitz Haber Article Takeaways
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Chem Catalyst: Homework: ① Bring a few uncrushed cans. ② On 10L, Summarize Boyle’s Law in 4 sentences. TABLE OF CONTENTS: 1) What is absolute zero? 2) What happens to the kinetic energy of gas particles when you decrease the heat? 3)Would pressure go down or up? Glue Sticks, $1 Notebook. Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations 10Boyle’s Law SummaryPractice #1-5 Boyle’s Law
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Diffusion: rate at which a gas travels across a room/container from high to low concentration.
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Agenda Correct HW (10 min) BL #1-5 on your own (15 min) Go over it (5 min) Dry Erase Races, Males VS Females!!!!
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Exit Ticket (1/2 sheet of paper) Turn this in 1.What is the coldest possible temperature? What happens at this point? 2.What are the temperature and pressure for STP? 3.What does Boyle’s Law say about the relationship between pressure and volume? 4.A sample of gas in a syringe has a volume of 10 L and a pressure of 3 atm. What is the new volume if the pressure is decreased to 1.5 atm?
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Chem Catalyst: Homework: ① Study Guide Q’s 12- 14, 19, 26 TABLE OF CONTENTS: Explain why people tend to put air into their tires during the winter and not during the summer? Glue Sticks, $1 Notebook. Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations 10Boyle’s Law SummaryBoyle’s Lab #1-5 11Quickwrites, Can CrushNotes: Charles’s Law, Lussac’s Law
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Relay Races
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Honors Relay Race Questions 1.What is absolute zero value? 2.At absolute zero, what happens at the molecular level? 3.It is 5 K outside. What is the temperature in o C? 4.It is 20 o C, what is the temperature in Kelvin? 5.What does Boyle’s Law state? 6.If I increase the volume will pressure increase or decrease? 7.I start with a gas that is 5 atm and a volume of 500 mL. If the final volume is 1500 mL, then what is the final pressure be in mmHg. 8. A 20.0 L tank of nitrogen has a pressure of 2.00 atm. Calculate the volume in dm 3 of nitrogen if its pressure is changed to 12.0 atm while its temperature remains constant. 9.What is standard temperature and pressure values?
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Relay Race Questions 1.What is absolute zero? 2.It is 5 K outside. What is the temperature in o C? 3.It is 20 o C, what is the temperature in Kelvin? 4.What does Boyle’s Law state? 5.If I increase the volume will pressure increase or decrease? 6.I start with a gas that is 5 atm and a volume of 500 mL. If the final volume is 1500 mL, then what is the final pressure? If in Honors, I want the pressure in mmHg. 7.Honors: A 20.0 L tank of nitrogen has a pressure of 2.00 atm. Calculate the volume in dm 3 of nitrogen if its pressure is changed to 12.0 atm while its temperature remains constant. 8.What is standard temperature and pressure?
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Quickwrite #2: What do you notice? Bullet points are fine. Draw Graph and explain it. Directly/indirectly proportional? Constant:
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Charles’s Law Shows the relationship between volume and temperature where pressure and moles of gas remain constant. Demo: Balloon under ice water? Shrinks Temperature Volume (directly proportional) Formula: T MUST be in Kelvin!!!!
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This is an direct relationship! As one goes up the other goes up!
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Example 1: A can had an initial volume of 5L and temperature of 250 o C. The temperature of the can then cooled to room temperature (20 o C), what will the final volume of the can be? Why does temperature increase volume at the molecular level?
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You Try and Discuss with Partner(s) A 2.5L balloon at T = 25 o C increases in volume at 45 o C, what is the new volume of the balloon? According to Charles’s Law, increasing temp increases volume, does the answer justify this law?
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Group 1 Alex A. Adolfo Charles Group 2 Genesis F. Diana O. Edward Group 3 Berenice G. Luis R. Christian Group 4 Jovanny H. Yalitza Leslie. Carlos Group 5 Brianna V. Joshalyn S. Mayumi Michael Group 6 Kenia G Alex H. Alredo Group 7 Ninfa J. Jacky D. Anthony G. Group 8 Vanessa V. Abel P. Jesus L Jose S Period 1 Lab Groups
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Period 3 Lab Groups Group 1 Paulina Victor Ben Group 2 Christina R. Christina G. Zaair Group 3 Paola G. Natalie C. Wendy Seidy Group 4 Carina Geovanni Karely Jose. G. Group 5 Valeria Miguel Ariana Marcos Group 6 Ashly Martin Oscar Group 7 Abigail James Josiah Group 8 Rene Jailene Susana, Veronica
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Period 5 Lab Groups Group 1 Aaron Gerry Lawrie Group 2 Jasmine Neddy Paola M. Group 3 Karla Karina Jacky Luis Group 4 Jesse Erwin Eric M. Daniel G. Group 5 George Jose Mathew D Steven Group 6 Ronald Raquel Raymundo Group 7 Rudy Stephanie B. Stephanie O. Brenda Group 8 Danny Nick Kim
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Period 4 Lab Groups Group 1 Erick Susana Yael Jose S. Group 2 Grace Kenny Marla Anika Group 3 Alan Yamileth Elizabeth Stephanie Group 4 Oscar Natalie Mayra Justlene Group 5 Andy Vanessa Jesus Kim M. Group 6 Tel Aviv Dale Kim Diaz Lizette Group 7 Antonio Yazmin Ana Itzel Group 8 Brisya Giovanni Ashley Alex..
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Period 6 Lab Groups Group 1 Alejandro Karina Evelyn Maggie Group 2 Janay Baylee Steven Group 3 Jorge Yuilisa Florian Maria Group 4 Hector Mario Fernando LeeAnn Group 5 Alicia Patty Ray Yuleni Group 6 Victoria Genesis Kathy Kate Group 7 Julyssa James Elizabeth Marco Group 8 Kharla Jeovannie David Sydney
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Next to your home group, work together on the following: 1.Study Guide Questions #9 10, 11, 16, 17, and 18 2.Group Leaders, make sure EVERYONE understands. 3.When done, check your answers with Mr. Narez
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Crushing a Can Without Touching It
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Procedures: Add 30mL of water to the inside of the can. Place flame under can using tongues until water VIGOROUSLY boils, steam must come out Carefully turn the can face down into the cold water bath. On 11L, Write, “Can Crush Demo” Write a 3-4 sentence hypothesis about what you think happened to the soda. What is happening at the molecular level? What observations would help support your hypothesis?
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Discussion: Why did the Can Get Crushed?
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Can Crush Explanation Below your first paragraph, paraphrase the following: 1.Before heating, can had air and water inside. 2.By boiling, kinetic energy increases and water turns into vapor causing the air to leave the can. 3.When submerged in water, the vapor turned back into water which does not take up the shape of the container so there’s all this empty space. 4.The air pressure outside the can is greater causing the can to compress.
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Think Pair Share: What do you notice? Directly/indirectly proportional?
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Lussac’s Law
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Shows the relationship between pressure and temp where volume and moles are constant. Temperature Pressure (directly proportional) Formula:
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Gay-Lussac’s Law Absolute Zero This is an direct relationship! As one goes up the other goes up!
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Example If a spray can had a pressure of 1.5atm and an initial temp at room temperature (20 o C), compute the internal pressure of the can when the gas reaches a temp of 600 o C?
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Next to your home group, work together on the following: 1.Study Guide Questions #6 7, 23, 24 Group Leaders, make sure EVERYONE understands. 2.When done, check your answers with Mr. Narez
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Homework Study Guide Q’s 12-14, 19, 26
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Chem Catalyst: Homework: ① Study Guide Q’s 5, 15, 21, 25 ② Quiz Wednesday TABLE OF CONTENTS: Solve for F in the following equation: AB = DE C F Glue Sticks or Tape, $1 Notebook. Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations 10Boyle’s Law SummaryBoyle’s Law #1-5 11Quickwrite #2, Can CrushNotes: Charles’s Law, Lussac’s Law 12Charles’s Law Graph using Water BathsNotes: Combined Gas Law 13
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Supporting Charles’s Law (12L) Temperature Change in Volume Ice Bath Temp: Room Temp: Hot Water Temp:
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Graphic Organizer on 11R In small font include Formulas Directly/inversely proportional? How does the graph look like? Examples from Labs/Demos (Syringe, Can Crush, Candle, Water and Balloon) Highlight key vocab Any other relevant information
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Supporting Charles’s Law (12L) Temperature Change in Volume Ice Bath Temp: Room Temp: Hot Water Temp:
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How to Get An Egg Into a Bottle
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Justify Why did the egg get sucked into the bottle? Draw a picture if it helps you explain.
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Combined Gas Law Boyle’s Law P,V Charles Law T, V Lussac’s law T, P
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Combined Gas Law Shows that P, V, and T are related. For Boyle’s, Charles’s and Lussac’s Law, one variable was changed to see its effect on another variable, but what if 2 variables were to be changed? Formula:
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Example 1: Solve for T 2
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Example 2 A child opens the door to an airplane. If a sealed bag of Lays BBQ had a volume of 450 mL and a temp of 22 o C at the planes’ cruising pressure of 0.95 atm, what will the volume of the air in that bag of chips be when the plane temperature drops to -40 o C, and he pressure drops to 0.25 atm.
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Example 3 You’re in a hot air balloon exploring the sea. The balloon had a pressure of 1atm and a temp of 20 o C and a volume of 5.0x 10 31 L, what will the pressure inside the balloon be if the temp of the balloon reached 2 o C with a 1170L volume?
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In 20 minutes: Complete Practice #1-3 (15 minutes) Go over it (5 minutes)
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Supporting Charles’s Law (12L) Temperature Change in Volume Ice Bath Temp: Room Temp: Hot Water Temp:
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Chem Catalyst: Homework: ① Combined Gas Law WS TABLE OF CONTENTS: A gas in a reaction vessel has a pressure of 1atm, a temp of 273K, and a volume of 1L. The reaction vessel stops working, the pressure drops to 0.5atm, the and the temperature drops to 250K. What is the new volume of gas in the reaction vessel? Glue Sticks or Tape, $1 Notebook. Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations 10Boyle’s Law SummaryBoyle’s Law #1-5 11Quickwrite #2, Can CrushNotes: Charles’s Law, Lussac’s Law 12Charles’s Law Graph using Water BathsNotes: Combined Gas Law 13Notes: Ideal Gas Law
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Agenda Study Time (10 min) Quiz (30 min) If done early, begin homework.
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Chem Catalyst: Homework: ① Combined Gas Law WS TABLE OF CONTENTS: Honors: A gas has a volume of 2L at STP. What will the new temperature be if the pressure increased to 2 atm and the volume increased to 3L? Regular Chem: Solve for A in the equation: AB = DE C F Unit 6: Gas Laws PgLeftRight 7Inquiry Station Lab: Gas LawsVocab To Know 8Quickwrite, Boyle’s Law Practice #1-4Notes: KMT and Boyle’s Law 95 Main Ideas, SummaryFritz Haber Article Annotations 10Boyle’s Law SummaryBoyle’s Law #1-5 11Quickwrite #2, Can CrushNotes: Charles’s Law, Lussac’s Law 12Charles’s Law Graph using Water BathsNotes: Combined Gas Law 13
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Ideal Gas Law Relates all four Gas Variables: P, V, T, n PV = nRT R is called the universal gas constant, its value depends on the units used for pressure: R = 8.314L kPa / mol K R= 0.0821L atm/mol K If the problem gives pressure in kPa use this R If the problem gives pressure in atm use this R
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Example 1 How many moles of gas are contained in 22.4L at 101.325 kPa and O o C? 4 variables are involves so I know I’ll be using PV = nRT Which R am I going to use? R = 8.314L kPa / mol K R= 0.0821L atm/mol K
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Example 1 How many moles of gas are contained in 22.4L at 101.325 kPa and O o C? 4 variables are involves so I know I’ll be using PV = nRT Which R am I going to use? R = 8.314L kPa / mol K R= 0.0821L atm/mol K
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Example 1 How many moles of gas are contained in 22.4L at 101.325 kPa and O o C? PV = nRT R = 8.314L kPa / mol K P = 101.325 kPa V = 22.4L T = 273 K (Kelvin!!!!!) n = ?????? Plug it in and solve for n!
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Example 1 How many moles of gas are contained in 22.4L at 101.325 kPa and O o C? PV = nRT R = 8.314L kPa / mol K P = 101.325 kPa V = 22.4L T = 273 K (Kelvin!!!!!) n = ??????
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Remember To use the correct R Make sure Temperature is in Kelvin. Make sure you write all units and cancel. Write answer with its correct unit!
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Example 2: How many moles of air molecules are contained in a 2L flask at 98.8kPa and 25 o C?
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You Try: Example 3 Calculate the pressure exerted by 43 moles of nitrogen in a 65L cylinder at 5 o C?
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You Try: Example 4 What will be the volume of 111 mol of nitrogen in the stratosphere, where T = -57 o C and the pressure is 1 atm?
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Honors: Too easy? Try Pg 442 Practice #1-3. Stoichiometry, Chemical Reactions, and Gas Laws combined into one problem!!!
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Group 1 Alex A. Adolfo Charles Group 2 Genesis F. Diana O. Edward Group 3 Berenice G. Luis R. Christian Group 4 Jovanny H. Yalitza Leslie. Carlos Group 5 Brianna V. Joshalyn S. Mayumi Michael Group 6 Kenia G Alex H. Alredo Group 7 Ninfa J. Jacky D. Anthony G. Group 8 Vanessa V. Abel P. Jesus L Jose S Period 1 Lab Groups
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Period 3 Lab Groups Group 1 Paulina Victor Ben Group 2 Christina R. Christina G. Zaair Group 3 Paola G. Natalie C. Wendy Seidy Group 4 Carina Geovanni Karely Jose. G. Group 5 Valeria Miguel Ariana Marcos Group 6 Ashly Martin Oscar Group 7 Abigail James Josiah Group 8 Rene Jailene Susana, Veronica
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Period 5 Lab Groups Group 1 Aaron Gerry Lawrie Group 2 Jasmine Neddy Paola M. Group 3 Karla Karina Jacky Luis Group 4 Jesse Erwin Eric M. Daniel G. Group 5 George Jose Mathew D Steven Group 6 Ronald Raquel Raymundo Group 7 Rudy Stephanie B. Stephanie O. Brenda Group 8 Danny Nick Kim
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Period 4 Lab Groups Group 1 Erick Susana Yael Jose S. Group 2 Grace Kenny Marla Anika Group 3 Alan Yamileth Elizabeth Stephanie Group 4 Oscar Natalie Mayra Justlene Group 5 Andy Vanessa Jesus Kim M. Group 6 Tel Aviv Dale Kim Diaz Lizette Group 7 Antonio Yazmin Ana Itzel Group 8 Brisya Giovanni Ashley Alex..
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Period 6 Lab Groups Group 1 Alejandro Karina Evelyn Maggie Group 2 Janay Baylee Steven Group 3 Jorge Yuilisa Florian Maria Group 4 Hector Mario Fernando LeeAnn Group 5 Alicia Patty Ray Yuleni Group 6 Victoria Genesis Kathy Kate Group 7 Julyssa James Elizabeth Marco Group 8 Kharla Jeovannie David Sydney
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What city has the most pollution? Which city has the least pollution?
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Examine the Data What similarities do you notice about the data? What differences do you notice?
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Environmental Justice Environmental Justice is the study of how and why traditionally underrepresented communities bare a disproportionate burden of environmental hazards Communities with a high minority population typically live in more polluted areas.
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Environmental Justice Reading Annotate and answer the questions with the article
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Health Impacts of Living in Pollution Increased chances of: – Lung Cancer – Respiratory Infections – Asthma This leads to countless missed days of school and lost hours at work
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Home Group Proposal With your group, create a proposal that: – Outlines an environmental problem that you see you in your community – Why this is a problem – How this problem should be fixed
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