Given :
A 3.82L balloon filled with gas is warmed from 204.9K to 304.8 K.
To Find :
The volume of the gas after it is heated.
Solution :
Since, their is no information about pressure in the question statement let us assume that pressure is constant.
Now, we know by ideal gas equation at constant pressure :

Hence, this is the required solution.
Characteristic properties are used because the sample size and the shape of the substance does not matter.
Answer:
The boiling point of the fluoromethane (CH3F) is higher than that of fluorine (F2).
Option C, mass would be same. Only the gravitational pull will be different