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General Biology: Moles, Mass, and Molarity

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Terms in this set (7)

  • What is one mole?

    One mole is 6.02 x 1023 entities, such as atoms, molecules, or ions.

  • How many daltons are in 1 gram?

    1 gram contains 6.02 x 1023 daltons.

  • What is a dalton (Da)?

    A dalton is a unit of mass equal to exactly one twelfth the mass of a carbon-12 atom, about 1.6605×10⁻²⁷ kg. It is used to express masses of atoms, molecules, and subatomic particles.

  • What is the mass of 1 mole of hydrogen?

    1 mole of hydrogen has a mass of 1 gram.

  • What is the mass of 1 mole of oxygen?

    1 mole of oxygen has a mass of 16 grams because oxygen atoms are larger and heavier.

  • Why does oxygen have a higher molar mass than hydrogen?

    Oxygen atoms are bigger and have more mass than hydrogen atoms, resulting in a higher molar mass.

  • Define molarity (M).

    Molarity is the number of moles of solute per liter of solution.