Chemistry's Amount of Substance Concept Quiz
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Questions and Answers

Which unit is used to measure the amount of substance in the International System of Units?

  • Liter
  • Mole (correct)
  • Gram
  • Meter

What is the value of the Avogadro constant NA as defined since 2019?

  • 6.02214076×1024 mol−1
  • 6.02214076×1025 mol−1
  • 6.02214076×1022 mol−1
  • 6.02214076×1023 mol−1 (correct)

What is the ratio that defines the amount of substance (n) in chemistry?

  • n = N - NA
  • n = N/NA (correct)
  • n = N + NA
  • n = N x NA

What is the amount of sodium chloride denoted as?

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

What was the mole historically defined as?

<p>The amount of substance in 12 grams of the carbon-12 isotope (A)</p> Signup and view all the answers

Which of the following entities can be considered as elementary entities in chemistry?

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

What is the unit of amount of substance in the International System of Units?

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

What is the chemical amount referred to as, informally, in a given sample of matter?

<p>Number of moles (B)</p> Signup and view all the answers

What was the mole historically defined as?

<p>The amount of substance in 12 grams of carbon-12 isotope (A)</p> Signup and view all the answers

What is the value of the Avogadro constant NA as defined since 2019?

<p>6.02214076×10^23 mol^-1 (B)</p> Signup and view all the answers

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