I believe it’s answer B because even in space gravity plays roles.
Answer : The concentration of
is, 0.12 M
Explanation :
Using Henry's law :

where,
= concentration of
= ?
= partial pressure of
= 4.5 atm
= Henry's law constant = 
Now put all the given values in the above formula, we get:


Thus, the concentration of
is, 0.12 M
Conduct experiments to see which hall Bounce the higher and see how they could collect data