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Understanding the Mole: A Key Concept in Chemistry

This webquest explores the concept of the mole, a fundamental unit of measurement in chemistry. Defined as the amount of a substance that contains as many elementary entities as there are atoms in 12 grams of carbon-12, the mole is essential for expressing quantities of chemical substances. Invented by Italian scientist Amedeo Avogadro in the 19th century, the mole allows scientists to convert between atoms, molecules, and grams efficiently. Engage in quizzes and learn fun facts about the mole's usage and significance in scientific investigations.

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Understanding the Mole: A Key Concept in Chemistry

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  1. Chemistry Webquest Mark L. The Mole

  2. What is a “Mole”? • By definition a mole is: The mole is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as an amount of a substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with atomic weight 12.

  3. Who invented the “Mole” • The concept of the mole in the scientific field of chemistry was actually discovered in the 19th century by an Italian scientist whose name was Amadeo Avogadro.

  4. Quiz • Who invented the mole? A. Armando Avocado B. Mr. Heder C. Amadeo Avogadro D. Albert Einstein

  5. Correct • Italian physicist Amedeo Avogadro put forth the hypothesis that equal volumes of gases under the same conditions of pressure and temperature contain the same number of particles. Fun Fact

  6. Wrong. • Try again.

  7. Quiz! What year was the “Mole” discovered? • 1805 • 2001 • 1905 • 1200

  8. Correct. Fun Fact • The Mole was not so much "discovered", but arbitrarily created. All this means is that scientists agreed upon a specific amount that will represent 1 mol of a substance. This amount was related to every element based on its average atomic mass value, which in the case of moles is named the molar mass.

  9. Wrong!

  10. Where is the “Mole” used? • The mole is used in the lab or classroom to convert a large number of atoms.

  11. Quiz! When/where do we use the mole? • Scientific Investigations • Mountain Climbing • Lab/Classroom • Both A and C

  12. Correct. Fun Fact • When you compare amounts of chemicals as they relate to each other, you need the mole ratio. A mole is 6.022 x 10^23, or Avogadro's number, molecules or atoms of any substance. The mole ratio compares the number of moles of one substance in a chemical equation with another substance, usually on the opposite side of the equation.

  13. Wrong!

  14. Why do we use the “Mole”? • Moles give us a consistent method to convert between atoms/molecules and grams. It's simply a convenient unit to use when performing calculations.

  15. Here is the animal the “Mole.”

  16. The END.

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