Molecular Mass Calculation Quiz
10 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What does the molecular mass of a substance represent?

  • The total number of protons in the molecule
  • The volume occupied by the substance
  • The sum of average atomic masses of all atoms in the molecule (correct)
  • The density of the substance

    • How is the molecular mass of a substance calculated?

  • Multiplying average atomic mass of each element by the number of its atoms and adding them together (correct)
  • Adding the number of protons and neutrons in each atom
  • Subtracting the atomic masses of different elements in the molecule
  • Dividing the total number of atoms by the number of elements

    • What is the molecular mass of carbon dioxide (CO2)?

  • $28.0$ u
  • $44.0$ u (correct)
  • $48.0$ u
  • $32.0$ u

    • In the molecule C6H5Cl, what does '6' represent?

    <p>Number of carbon atoms</p> Signup and view all the answers

    What is the molecular mass of H2SO4?

    <p>$98$ u</p> Signup and view all the answers

    What is the mass of one hydrogen atom in grams?

    <p>1.6736 × 10^-24 g</p> Signup and view all the answers

    In the present atomic mass system, what is the standard element used for determining atomic masses?

    <p>Carbon-12</p> Signup and view all the answers

    What is the exact mass assigned to an atom of carbon-12 in the atomic mass unit system?

    <p>12.00000 amu</p> Signup and view all the answers

    How is an atomic mass unit (amu) defined in terms of the mass of a carbon-12 atom?

    <p>One twelfth of the mass of one carbon-12 atom</p> Signup and view all the answers

    What unit has recently replaced the atomic mass unit (amu) and is symbolized by 'u' or 'Da'?

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

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser