Answer:
I say both I hope this helps
Kojohogofodosoaozoxocovobonomoqowoeorotoyouoiopooo0
I think it's because particles in gases are farther apart and move faster
The initial volume is 158mL
C1V1=C2V2
V1+C2V2/C1= 0.588Lx1.84 M / 6.84 M = 0.158L= 158mL