How many grams of chlorine must be added to a balloon containing 8.00 grams of helium to double its volume?
a. 4 grams
b. 79 grams
c. 8 grams
d. 16 grams
e. 2 grams
The mole number of helium is 8/4=2 mol. Under same condition, the volume of gas is related to the mole number of the gas. So the mole number of chlorine is also 2 mol which is 142 g.
