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 (C)</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 (C)</p> Signup and view all the answers

Which particle unit refers to covalent compounds?

<p>Molecules (A)</p> Signup and view all the answers

What is the value of Avogadro's number?

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

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

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

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

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

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

<p>20.01 moles (D)</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 (B)</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 (B)</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 (C)</p> Signup and view all the answers

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