What is the significance of Avogadro’s number in Chemistry Class 11?
Answer (1)
Avogadro's number (approximately 6.022 x 1023) is fundamental in chemistry because it defines the mole, the SI unit for the amount of substance. Its significance includes:
- It bridges the gap between the atomic/molecular world (atoms, molecules, ions) and the macroscopic world of grams and liters that we can measure in the lab.
- It allows us to count extremely large numbers of atoms or molecules by relating them to a manageable mass or volume. Knowing Avogadro's number, we can determine how many atoms are present in a certain mass of an element.
- It's essential for determining the molar mass of a substance (the mass of one mole of that substance), which is crucial for stoichiometric calculations.
- It helps understand the quantitative relationships between reactants and products in chemical reactions.
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