Sodium carbonate.
Hope this helps
Answer:
V2= 5L
Explanation:
P1= 500kPa, V1= 3L, P2= 300kPa, V2=?
Applying Boyle's law
P1V1=P2V2
(500*3)= (300*V2)
V2= 5L
You nutted in her left eye
It should be 0.25 M. Use the formula C1*V1=C2*V2, for those values, as it is right when it changed colour. Remember to change the if those are not the same (but in your case it is, so no need this time).
C1*V1=C2*V2
C1*27ml=0.55M*12.5ml
C1=(0.55M*12.5ml)/27ml = 0.25M