Question

Consider an ordinary 8 oz. glass of water (H₂0). Suppose, hypothetically, that all of the water molecules in the glass could be marked. Then, suppose that you poured this glass of water into the ocean and (hypothetically) stirred up the ocean so that all of the molecules were evenly distributed. If you then extracted the same amount (8 oz.) of water from the ocean anywhere in the world, how many of those marked molecules, on the average, would you expect to find? (The volume of the world ocean is 1.35 billion km³ .)

Answer 1

A glass of water is poured into ocean and the ocean water is well stirred by some means. Then a glass of water from the ocean is collected. How many of the water molecules that were initially in the glass are there in the collected water., on the average?