1. Find the molar mass of KCl:
* Potassium (K): 39.10 g/mol
* Chlorine (Cl): 35.45 g/mol
* Molar mass of KCl: 39.10 g/mol + 35.45 g/mol = 74.55 g/mol
2. Calculate the moles of KCl:
* Moles = mass / molar mass
* Moles of KCl = 125 g / 74.55 g/mol = 1.676 moles
3. Determine the moles of potassium (K):
* The chemical formula KCl tells us that there is one mole of potassium for every mole of potassium chloride.
* Therefore, there are also 1.676 moles of potassium (K) in 125 g of KCl.
