Question

how many moles is 1.22 grams of flourine gas F2)

Answer 1

To convert grams to moles:
You have 1.22 grams of Fluorine gas (F₂)
F₂ = 18.998 g/mol F₂ × 2 (subscript of F₂) = 37.996 g/mol F₂
Divide 37.996 g/mol F₂ by 1.22 g F₂ so:
$\frac{1.22 g F2} {37.996 g/mol F2}$ =
0.032 moles of F₂