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Mole Concepts

 
3.2  Mole Concept
 
This image is an infographic about the concept of ‘MOL’ in chemistry. It includes the following details: 1. The SI unit of the amount of substance. 2. The symbol for mol. 3. 1 mol of a substance equals 6.02214076×10^23 elementary entities of the substance. 4. Avogadro constant, NA, or Avogadro number equals 6.02×10^23 mol^-1. 5. 1 mol of a substance consists of 6.02×10^23 particles. The infographic is visually organized with a light bulb icon in the center and arrows pointing to each of the five points. The background is white, and the text is in blue.
 
Number of Moles and Number of Particles
Number of Mole

\(\,\\ \text{Number of mole, }n = \dfrac{\text{Number of particles}}{N_A} \)
Conversion Factor Between Number of Moles and Number of Particles

 

The image shows a diagram explaining the relationship between the number of moles and the number of particles. There are two red boxes with white text. The box on the left reads ‘Number of moles,’ and the box on the right reads ‘Number of particles.’ There are two blue circles with white text: the top circle reads ‘x N_A’ and the bottom circle reads ‘÷ N_A.’ Arrows indicate the direction of conversion between the number of moles and the number of particles.
 
Number of Moles and Mass of Substance
Definition of Molar Mass
  • The mass of a substance that contains one mole of the substance.
Number of Moles

\(\, \\ \text{Number of mole, }n = \dfrac{\text{Mass (g)}}{\text{Molar mass (g mol}^{-1})} \\ \)
Conversion of the Number of Moles to the Mass of Substance

This image shows a flowchart for converting between the number of moles and mass (in grams). The chart has two main sections: ‘Number of moles’ and ‘Mass (g).’ Arrows indicate the direction of conversion. To convert from the number of moles to mass, you multiply by the molar mass. To convert from mass to the number of moles, you divide by the molar mass. The background is a lined notebook paper.
 
Number of Moles of A Gas and Its Volume
  • At the same temperature and pressure, equal volumes of all gases contain the same number of particles.
  • One mole of any gas at room temperature(25℃) and pressure of 1 atm occupies a volume of \(\text{24 dm}^3\) (or \(\text{24 000 cm}^3\)).
  • At standard temperature and pressure, s.t.p. ( 0℃ and 1 atm) 1 mole of gas occupies \(\text{22.4 dm}^3\) of volume.
Conversion of the Number of Moles of A Gas to its Volume

 

Number of Moles \(\longrightarrow\) Volume of Gas

\(\, \\ \text{Number of moles} \times \text{Molar value}\\\)

 

Volume of Gas \(\longrightarrow\) Number of Moles

\(\, \\ \text{Volume of gas} \div \text{Molar volume}\\\)

 

This image is a flowchart illustrating the relationships between different quantities in chemistry. At the top, there is a red box labeled ‘Mass (g).’ Below it, there are three red boxes labeled ‘Number of particles,’ ‘Number of mole,’ and ‘Volume of gas (dm³)’ from left to right. Arrows indicate the conversions between these quantities: - From ‘Number of particles’ to’Number of mole,’ the arrow is labeled ‘÷ N_A.’ - From ‘Number of mole’ to ‘Number of particles,’ the arrow is labeled ‘x N_A.’ - From ‘Number of mole’ to ‘Mass (g),’ the arrow is labeled ‘x Molar mass.’ - From ‘Mass (g)’ to ‘Number’

 
 

 

 

 

 

 

 

 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.

Mole Concepts

 
3.2  Mole Concept
 
This image is an infographic about the concept of ‘MOL’ in chemistry. It includes the following details: 1. The SI unit of the amount of substance. 2. The symbol for mol. 3. 1 mol of a substance equals 6.02214076×10^23 elementary entities of the substance. 4. Avogadro constant, NA, or Avogadro number equals 6.02×10^23 mol^-1. 5. 1 mol of a substance consists of 6.02×10^23 particles. The infographic is visually organized with a light bulb icon in the center and arrows pointing to each of the five points. The background is white, and the text is in blue.
 
Number of Moles and Number of Particles
Number of Mole

\(\,\\ \text{Number of mole, }n = \dfrac{\text{Number of particles}}{N_A} \)
Conversion Factor Between Number of Moles and Number of Particles

 

The image shows a diagram explaining the relationship between the number of moles and the number of particles. There are two red boxes with white text. The box on the left reads ‘Number of moles,’ and the box on the right reads ‘Number of particles.’ There are two blue circles with white text: the top circle reads ‘x N_A’ and the bottom circle reads ‘÷ N_A.’ Arrows indicate the direction of conversion between the number of moles and the number of particles.
 
Number of Moles and Mass of Substance
Definition of Molar Mass
  • The mass of a substance that contains one mole of the substance.
Number of Moles

\(\, \\ \text{Number of mole, }n = \dfrac{\text{Mass (g)}}{\text{Molar mass (g mol}^{-1})} \\ \)
Conversion of the Number of Moles to the Mass of Substance

This image shows a flowchart for converting between the number of moles and mass (in grams). The chart has two main sections: ‘Number of moles’ and ‘Mass (g).’ Arrows indicate the direction of conversion. To convert from the number of moles to mass, you multiply by the molar mass. To convert from mass to the number of moles, you divide by the molar mass. The background is a lined notebook paper.
 
Number of Moles of A Gas and Its Volume
  • At the same temperature and pressure, equal volumes of all gases contain the same number of particles.
  • One mole of any gas at room temperature(25℃) and pressure of 1 atm occupies a volume of \(\text{24 dm}^3\) (or \(\text{24 000 cm}^3\)).
  • At standard temperature and pressure, s.t.p. ( 0℃ and 1 atm) 1 mole of gas occupies \(\text{22.4 dm}^3\) of volume.
Conversion of the Number of Moles of A Gas to its Volume

 

Number of Moles \(\longrightarrow\) Volume of Gas

\(\, \\ \text{Number of moles} \times \text{Molar value}\\\)

 

Volume of Gas \(\longrightarrow\) Number of Moles

\(\, \\ \text{Volume of gas} \div \text{Molar volume}\\\)

 

This image is a flowchart illustrating the relationships between different quantities in chemistry. At the top, there is a red box labeled ‘Mass (g).’ Below it, there are three red boxes labeled ‘Number of particles,’ ‘Number of mole,’ and ‘Volume of gas (dm³)’ from left to right. Arrows indicate the conversions between these quantities: - From ‘Number of particles’ to’Number of mole,’ the arrow is labeled ‘÷ N_A.’ - From ‘Number of mole’ to ‘Number of particles,’ the arrow is labeled ‘x N_A.’ - From ‘Number of mole’ to ‘Mass (g),’ the arrow is labeled ‘x Molar mass.’ - From ‘Mass (g)’ to ‘Number’

 
 

 

 

 

 

 

 

 

 

The views expressed in the notes here are those of the contributor and don’t necessarily represent the views of pandai.
Chapter : Mole Concept, Chemical Formulae and Equations
Topic : Mole Concepts
Form 4 Chemistry
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