It rises until the density of the atmosphere, which thins as you go higher, is equal to that of the gas. Then the gas disperses into that level of the atmosphere.
It evaporates.
it rises at midnight
In a "hot air" balloon, which you refer to in your question, the gas is hot air. Heated air rises, so the balloon rises. The gas used in the burner, to heat the air, is propane.
temperature rises it first becomes opaque pressure rises density rises so in other words all the above
It rises into the air and condenses to become clouds.
it expands and/or its pressure rises, depending on conditions.
Gas molecules are spread out. When they are placed under pressure they condense into a liquid.
What happens when domestic income rises?
Pressure rises at the junction.
it rises
Baloon filled with hydrogen gas float in air or rises if the quntity of gas it contain is adjusted so that the average density of the balloon is just eguall to the density of the surrounding air.The weight of the displaces air is then eguall to the weight of the balloon
it rises
when it rises it becomes a cloud
As water vapor cools to the dew point it converts from a gas back to a liquid.
it gets warmer as it rises
when any gas is expanded, it's pressure would drop and the temperature would drop as well resulting with cold atmosphere.
Yes. as temperature rises pressure rises and density rises.