For the reaction: hf(aq) ⇌ h+(aq) + f-(aq), determine the change in the ph (δph) for the addition of 1.75 m naf salt to a 5.45 m solution of hf, ka=7.2 × 10-4 ?

93.2 ml + 3920 ml = 4013 ml total  

(93.2 ml) * (2.03 m) / (4013 ml) = 0.0471 m

the volume in in l of the diluted solution would be 0.0471 m.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.

i'm pretty sure it is letter c.) car

hurricanes form in warm water