Websites that end in .com or .org should be avoided.
I'm not to sure but try soy
Answer:
16.06 L was the initial volume of the balloon.
Explanation:
Initial moles of freon in ballon = 
Initial volume of freon gas in ballon = 
Moles of freon gas added in the balloon = n = 3.50 mole
Final moles of freon in ballon = 
Final volume of freon gas in ballon = 
Using Avogadro's law:
( at constant pressure and temperature)

16.06 L was the initial volume of the balloon.
I remember learning this last y’all i jus don’t remember it might be A or C
The answer is c. because you have to increase concentration of h2