if you pour a cup of water to the ocean and the next day you scoop up the same amount of water you poured?

Question

how many of H2O i dumped will be in the cup after you scooped it from the ocean?

Answer 1

Any rational attempt on your part to answer this question on your own will be more educational than asking here. Just do some thinking, look up some numbers, and so some math.

Answer 2

There are too many random factors are involved here to answer this one. Ocean currents vary constantly. Temperature varies. Wind and wave action vary. Do you scoop the water up at exactly the same location, at exactly the same time ? All you can say is that you take out the same amount you put in.
Considering the enormous number of water molecules in a cup, it is indeed likely you will get a very small quantity of the same molecules back -- but how could you ever tell anyway ?

I have read that we all breathe a few air molecules each breath that were once breathed by such famous people as Julius Caesar, or George Washingon. If this is true of the air that we breathe, it should also be true of the ocean waters, which are mixed much like the air is. So you would indeed get back some of the same H2O molecules you put in yesterday! The count is small, and quite uncertain -- but you would get a few molecules to "recycle" for you.

Answer 3

Could be all, could be some, could be none.
Probability of any at all, = Zero.

Answer 4

Whoa, I have no clue.