Answer:
150 g F₂
Step-by-step explanation:
To find the mass of F₂, you need to
(1) convert grams F to moles (using the molar mass of F)
(2) convert moles F to moles F₂ (using the mole-to-mole ratio from the balanced equation)
(3) convert moles F₂ to grams (using the molar mass of F₂)
It is important to arrange the conversions/ratios in a way that allows for the cancellation of units.
Molar Mass (F): 18.998 g/mol
Molar Mass (F₂): 2(18.998 g/mol) = 37.996 g/mol
1 F₂ -----> 2 F
^ ^
150 g F 1 mole 1 mole F₂ 37.996 g
--------------- x ----------------- x ------------------- x ------------------ = 150 g F₂
18.998 g 2 moles F 1 mole