Understanding the Concepts
* Mole (mol): A unit of measurement for the amount of a substance. One mole contains 6.022 x 10²³ particles (atoms, molecules, ions, etc.). This is known as Avogadro's number.
* Millimole (mmol): One-thousandth of a mole (1 mmol = 0.001 mol).
Calculation
1. Convert millimoles to moles: 1 mmol = 0.001 mol
2. Use Avogadro's number: Multiply the number of moles by Avogadro's number to find the number of molecules.
Therefore:
Number of ammonia molecules = (0.001 mol) * (6.022 x 10²³ molecules/mol)
= 6.022 x 10²⁰ molecules
Answer: There are 6.022 x 10²⁰ molecules of ammonia present in one millimole of ammonia.
