If 2.5 x 10-4 moles of Na2S2O3 is present in the starting solution, how many moles of H2O2 are used up by the time the solution turns blue? If the total volume of the solution is 100 mL and the reaction requires 600 seconds, what is the value of the average rate of reaction ( -Δ[H2O2]/Dt)? Show units.

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 think that the answer is c

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.