Understanding the Concept
* Avogadro's Number: One mole of any substance contains 6.022 x 10²³ particles (atoms, molecules, etc.). This number is known as Avogadro's number.
Calculation
1. Start with the number of moles: You have 1.55 moles of Cs.
2. Multiply by Avogadro's number:
1.55 moles Cs * (6.022 x 10²³ atoms Cs / 1 mole Cs) = 9.34 x 10²³ atoms Cs
Answer: There are approximately 9.34 x 10²³ atoms in 1.55 moles of Cesium.
