You have 5 grams of f how many moles of fluorine do you have? How many moles of boron trifluoride can you produce from fluorine? How many grams can you produce of boron trifluoride from fluorine?

Question

f = fluorine i assume you know what that is

Answer 1

Hi Dominic W.,

Maybe the question should be, how is it that you don't know that fluorine occurs as F₂ , not as "f"?

So, write a balanced equation for the reaction. I assume you know what "balanced" means? Then follow the coefficients to see the proportions that occur in the reaction. You should have 3 on the F₂ and 2 on the BF₃ . Take the ratio and apply it. You might call that "working the reaction".

When you have the # moles of BF₃ produced you use the molar mass of BF₃ to convert to grams mass of BF₃ . We'll assume you know how to add up a molar mass, from the Periodic Table?

-- Cheers, --Mr. d.