What is meant by one mole of a substance?
- Leaving Cert Chemistry - Question 1 - 2014
Question 1
What is meant by one mole of a substance?
Worked Solution & Example Answer:What is meant by one mole of a substance?
- Leaving Cert Chemistry - Question 1 - 2014
Step 1
Definition of One Mole
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Answer
One mole of a substance is defined as the amount that contains as many particles as there are atoms in 0.012 kg (12 g) of carbon-12. This is a fundamental concept in chemistry that allows for quantitative analysis of chemical reactions.
Step 2
Relation to Avogadro's Number
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It can also be described as containing the Avogadro number of particles, which is approximately 6.02imes1023. This constant provides a bridge between the atomic scale and the macroscopic scale of materials.
Step 3
Mass and Mole Relationship
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Furthermore, one mole of a substance is equal to its relative formula (molecular) mass (M) expressed in grams. For example, if the molecular mass of a compound is 18 g/mol, then one mole of that compound weighs 18 grams.
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