Here's how to calculate the number of moles in 1.8 grams of fluorine:

1. Find the molar mass of fluorine (F):

* The molar mass of fluorine is approximately 19 g/mol. This means that 1 mole of fluorine atoms weighs 19 grams.

2. Use the formula:

* moles = mass / molar mass

3. Plug in the values:

* moles = 1.8 g / 19 g/mol

* moles ≈ 0.095 mol

Therefore, there are approximately 0.095 moles in 1.8 grams of fluorine.