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Track Exit Tickets Under “score” column in Table of Contents , write your percentage score:

Track Exit Tickets Under “score” column in Table of Contents , write your percentage score: 0/5 = 0% 3/5 = 60% 1/5 = 20% 4/5 = 80% 2/5 = 40% 5/5 = 100% Under “mastery” column, Write Y for 80% or higher, N for lower than 80%. Table of Contents. Investigation (10 min).

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Track Exit Tickets Under “score” column in Table of Contents , write your percentage score:

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  1. Track Exit Tickets • Under “score” column in Table of Contents, write your percentage score: 0/5 = 0% 3/5 = 60% 1/5 = 20% 4/5 = 80% 2/5 = 40% 5/5 = 100% • Under “mastery” column, Write Y for 80% or higher, N for lower than 80%

  2. Table of Contents

  3. Investigation (10 min) Attempt all problems

  4. Instruction

  5. What is Standard Temperature and Pressure (STP)? • Standard Temperature and Pressure is defined as 273.15 K and 1 atm • “Standard” because used throughout the world tocompare results and experimental conditions

  6. Why do all gases occupy the same volume at STP? • According to the ideal gas law, PV=nRT • Regardless of the gas, If pressure=1atm and temperature=273.15, then solving for V, 1 mole of any gas occupies a volume of 22.4 L • At STP 1 mole= 22.4 L

  7. Even though gas molecules have different sizes (look at atomic masses), according to KMT, the volume of a gas particle is negligible to the space in occupies. • Therefore all ideal gases with the same number of moles under the same pressure and temperature conditions will have the same volume!

  8. Key Point 3: How do I convert between moles and liters of a gas at STP? • 1. Identify the givens (underline) • 2. Determine if the temperature and pressure are at STP. • 3. Identify the unknowns. (circle) • 4. Use the conversion factor 22.4L = 1 mol • 5. Set up the problem so that your units cancel. • 6. Solve

  9. Example 1: Jaime has 5 moles of a gas at STP. What is the volume of the gas?

  10. Example 2: Irving has 45 L of nitrogen in a balloon at STP. How many moles of nitrogen are in the balloon?

  11. Example #3: Extension—Can we use molar volume AND stoichiometry in the same problem? 2ClNO2+ NO  2NO2 + 2ClO 40 L of NO gas is combined with excess ClNO2 at STP. How many liters of NO2 gas are formed?

  12. 2ClNO2 + NO  2NO2 + 2ClOExample #4: 32 L of ClNO2 gas are combined with excess NO gas at STP. How many liters of ClO gas are formed?

  13. Independent Practice

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