Amount of Substance in AQA A-Level Chemistry
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Questions and Answers

What is the SI base unit for amount of substance in chemistry?

  • Kelvin
  • Gram
  • Mole (correct)
  • Liter
  • Which term refers to the number of entities in a sample?

  • Mole ratio
  • Mole (correct)
  • Molarity
  • Molar mass
  • In chemistry, Avogadro's constant is a fundamental concept that relates to the number of ________ in one mole of a substance.

  • Electrons
  • Protons
  • Molecules (correct)
  • Atoms
  • The molar mass of a substance is defined as the mass of ________ in one mole of the substance.

    <p>Molecules and atoms</p> Signup and view all the answers

    Which term describes the concentration of a solution expressed in moles of solute per liter of solution?

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

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