Yes. The air around you is 78% nitrogen, 21% oxygen and about 1% Argon
Neither. Air is a mixture. Also, whether something is a compound or an element does not depend on temperature.
In a particular area, air is a homogeneous mixture.
CO2 gas is more dense than the mixture of air we breathe. You can see this when dry ice sublimates.
solution, which is a homogeneous mixture
It is a mixture of air with one or more other gases.
lecture room, store room, preparation room
The pure nitrogen is a chemical element, gaseous at room temperature.
A room air conditioner will being putting out a haze if the air contains high levels of humidity. The mixture of cold and warm air will produce visible water vapor.
No. Air is a mixture.
The acoustics in the lecture room are terrible.
"A mi aula" translates to "to my classroom" in English.
Yes, air is a mixture. It is a homogeneous mixture.
Neither. Air is a mixture. Also, whether something is a compound or an element does not depend on temperature.
Air is a homogeneous mixture.
Air is a homogeneous mixture.
No air is not a homogeneous mixture, air is a heterogeneous mixture.
Air is a mixture.