C3.3 The mole and the Avogadro constant

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Last updated 11:17 PM on 8/1/26
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6 Terms

1
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What is a mole?

  • Unit for measuring the quantity of a chemical substance.

  • Contains 6.02×1023 particles (Avogadro’s constant)


2
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Mole with molar mass 

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3
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Mole with volume

1 dm3 = 1000 cm3 (dmx1000)

1cm3 = 0.001dm3

<p>1 dm<sup>3</sup>&nbsp;= 1000 cm<sup>3</sup>&nbsp;(dmx1000)</p><p>1cm<sup>3</sup>&nbsp;= 0.001dm<sup>3</sup></p>
4
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How to calculate number of particles from a mole?



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What is a limiting reactant?

  • The reactant in a chemical reaction that is used up first and determines the amount of product that is formed


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How to calculate limiting reactant?

  1. Balance the chemical equation

  2. Calculate number of moles of each reactant

  3. Divide the number of moles of each reactant by the coefficients from the balanced equation

  4. The smaller result is the limiting reactant

  • If there is no coefficient, the smaller amount of moles is the limiting reactant