Here's how to calculate the number of moles in 55 g of lithium chloride (LiCl):

1. Find the molar mass of LiCl:

* Lithium (Li) has a molar mass of 6.941 g/mol

* Chlorine (Cl) has a molar mass of 35.453 g/mol

* Molar mass of LiCl = 6.941 g/mol + 35.453 g/mol = 42.394 g/mol

2. Use the formula:

* Moles = Mass / Molar mass

3. Substitute the values:

* Moles = 55 g / 42.394 g/mol

* Moles ≈ 1.30 mol

Therefore, there are approximately 1.30 moles in 55 g of lithium chloride.