Molecules per Mole Formula:
From: | To: |
Definition: This calculator determines the number of molecules in a given amount of substance using Avogadro's number.
Purpose: It helps chemists, students, and researchers convert between moles (amount of substance) and number of molecules.
The calculator uses the formula:
Where:
Explanation: One mole of any substance contains exactly Avogadro's number of particles (atoms, molecules, ions, etc.).
Details: This conversion is fundamental in chemistry for stoichiometric calculations, reaction yields, and understanding molecular quantities.
Tips: Enter the amount of substance in moles and Avogadro's number (default 6.022e23). All values must be > 0.
Q1: What is Avogadro's number?
A: It's the number of constituent particles (usually atoms or molecules) in one mole of a substance (6.02214076 × 10²³ mol⁻¹).
Q2: Why is this number important?
A: It provides a link between the macroscopic and microscopic worlds, allowing chemists to count particles by weighing.
Q3: Does Avogadro's number change for different substances?
A: No, it's a universal constant that applies to all substances.
Q4: How precise is Avogadro's number?
A: The 2019 redefinition of SI units fixed it at exactly 6.02214076 × 10²³ mol⁻¹.
Q5: Can I calculate atoms instead of molecules?
A: Yes, the calculator works for any elementary entities (atoms, molecules, ions, etc.).