Moles and the Unit of Amount of Substance Quiz
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Questions and Answers

Which of the following is the correct definition of the mole?

  • The quantity of elementary entities in one mole is the Avogadro number
  • The mole is defined as exactly 6.02214076×1023 elementary entities
  • The unit of amount of substance in the International System of Units (SI) (correct)
  • The number of elementary entities in one mole is the approximate number of nucleons in one gram of ordinary matter

    • Which of the following is an example of an elementary entity?

  • An ion pair
  • A chemical compound like water
  • A subatomic particle such as a proton (correct)
  • A chemical element like mercury

    • Which statement about the mole is correct?

  • 10 moles of water and 10 moles of mercury contain equal amounts of substance
  • The Avogadro number is the number of elementary entities in one mole
  • The mole was defined as the number of elementary entities before the 2019 redefinition of SI base units (correct)
  • The mole is the approximate number of nucleons in one gram of ordinary matter

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