General Chemistry 1: Atomic Mass, Mole Concept and Avogadro's Number Review
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Questions and Answers

What is the value of Avogadro’s number?

  • 5.022 X 10^22
  • 6.022 X 10^23 (correct)
  • 6.670 X 10^23
  • 7.405 X 10^23

    • What is the atomic mass used to find?

  • The quantity of particles in a substance
  • The charge of an atom
  • The number of protons in an element
  • The average mass of an element and molecules (correct)

    • What does the term 'mole' refer to?

  • Number of protons and neutrons in an atom
  • Quantity of particles in a substance equal to Avogadro’s number (correct)
  • Value of 6.022 X 10^23
  • Mass of 1 atom expressed in atomic mass units

    • Where can the average atomic mass of an element be found?

    <p>Number of protons and neutrons</p> Signup and view all the answers

    What does the mass of an atom divided by the atomic mass unit give?

    <p>Relative atomic mass of an element</p> Signup and view all the answers

    Which particle unit refers to covalent compounds?

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

    What is the value of Avogadro's number?

    <p>6.022 x 10^23</p> Signup and view all the answers

    What is the formula mass of Na₃PO₄ (sodium phosphate)?

    <p>163.94 amu</p> Signup and view all the answers

    What is the molar mass of carbon dioxide (CO₂)?

    <p>44.01 g/mol</p> Signup and view all the answers

    How many moles are there in 460.0 g of sodium (Na)?

    <p>20.01 moles</p> Signup and view all the answers

    How many sodium atoms are there in 460.0 g of sodium (Na)?

    <p>$2.404 \times 10^{24}$ atoms</p> Signup and view all the answers

    How many atoms and the mass of 0.85 mole of copper (Cu)?

    <p>$5.12 \times 10^{23}$ atoms, 27 g</p> Signup and view all the answers

    How many grams and atoms of hydrogen are present in 65 grams of glucose (C₆H₁₂O₆)?

    <p>$4.824 \times 10^{23}$ atoms, 48 g</p> Signup and view all the answers

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