The Mole in Chemistry
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Questions and Answers

What is the definition of a mole?

  • The number of protons in one gram of ordinary matter
  • The number of molecules in one gram of ordinary matter
  • The number of neutrons in one gram of ordinary matter
  • The number of atoms in one gram of ordinary matter (correct)

    • Which unit is used to measure the amount of substance in the International System of Units (SI)?

  • Liter
  • Gram
  • Mole (correct)
  • Second

    • What is the Avogadro number?

  • The number of atoms in one gram
  • The number of grams in one mole
  • The number of moles in one gram
  • The number of elementary entities in one mole (correct)

    • Which of the following substances contains exactly one atom for each molecule of water?

    <p>Mercury</p> Signup and view all the answers

    What was the definition of a mole before the 2019 redefinition of SI base units?

    <p>The number of elementary entities in one mole</p> Signup and view all the answers

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