Atoms Formula:
From: | To: |
The mole is the SI unit for amount of substance, and Avogadro's number (6.022 × 10²³) represents the number of atoms in exactly 12 grams of carbon-12. This conversion allows chemists to relate the microscopic world of atoms to measurable quantities.
The calculator uses the formula:
Where:
Explanation: This conversion factor allows us to calculate the exact number of atoms in a given amount of substance measured in moles.
Details: Avogadro's number is fundamental to chemistry, providing the crucial link between the atomic scale and the macroscopic world. It enables precise measurement and calculation in chemical reactions and stoichiometry.
Tips: Enter the amount of substance in moles. The value must be positive. The calculator will automatically compute the corresponding number of atoms using Avogadro's constant.
Q1: What exactly is a mole?
A: A mole is the amount of substance that contains as many elementary entities (atoms, molecules, ions) as there are atoms in exactly 12 grams of carbon-12.
Q2: Why is Avogadro's number important?
A: It provides the crucial conversion factor between the atomic/molecular scale and measurable quantities, making chemical calculations and measurements possible.
Q3: Can this calculator be used for molecules too?
A: Yes, the same conversion applies. If you have 1 mole of water (H₂O), you have 6.022 × 10²³ water molecules.
Q4: How precise is Avogadro's number?
A: The value 6.02214076 × 10²³ is now exactly defined as part of the SI system revision in 2019, making it a fixed constant without uncertainty.
Q5: Are there different values for different elements?
A: No, Avogadro's number is universal and applies equally to all elements and compounds. One mole of any substance contains exactly 6.022 × 10²³ entities.