Air is made up of a number of different compounds and elements that all freeze at different temperatures. Some of them never freeze. eg. nitrogen. Others like carbon dioxide will freeze at -78.5 degrees centergrade
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Nitrogen can freeze anything and i think it is a frozen gas.
Yes, but it would have to become very cold very fast for it to remain gas and then just freeze. This process is called sublimination. This is also the name for a straight solid-to-gas state change, through high heat (you know those evaporator guns in science fiction? Not happening on people. They'd need a sublimination gun)If it gets cold enough, gas will turn to liquid, this is called condensing, and it how precipitation is formed.
0 degrees Celsius.
True. Freezing would compress the gas in the ball and reduce the elasticity of the rubber in it.
The boiling point of water is 100 degree celsius. Therefore water changes in to vapor after 100 degree celsius. Therefore the physical state of water at 250 degree celsius is "Gas".