At Mercury, the Ohio Players enjoyed their greatest success; not only did their sound coalesce, but they became notorious for their sexually provocative LP covers, a tradition begun during their Westbound tenure.
Objects float when the volume of water they displace is less than the volume of the objects themselves. When objects sink, the volume of water they displace is greater than the volume of the object. The principle may seem relatively simple: Light objects float and heavy objects sink.
The gas is collected in the container and the pressure of the gas pushes the water out of the container. It doesn't matter if the gas is heavier or lighter than air.As long as it's less dense than water it will rise to the top of the container and displace the water. am pretty sure it is A because you could use a test tube or beaker filled with water and turn it upside down in another container filled with water and then use a hose or something to let the gas into the test tube to displace the water.