What will be the new concentration of PNP, if 30.5 uL of 2.15*10-4M PNP stock solution is mixed with 276.8 uL of water?

Question

Report your numeric answer in the units of microMolar (uM)

would i divide the molarity by the total concentration

Answer 1

concentration is inversely proportional to the total solution volume

Answer 2

so if the volume goes up the concentration will go down. Is there a formula to calculate this new concentration. I know there is m1v1=m2v2 and other ways to calculate this but it has been so long since i have seen any of this stuff im not really sure what route to go

Answer 3

as long as the amount of solute stays constant

molarity1 * volume1 = molarity2 * volume2