10^19
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It is estimated that there are about 10^19 air molecules in a cubic centimeter.
cold air
It depends on the material the particles used is and the phase of it (plasma, gas, liquid or solid.)
Cold air has more molecules occupying space than warm air, therefore it has high pressure.
Cold air has higher pressure than warm air because there are more air molecules in a given volume, leading to more frequent collisions with the walls of the container, thus generating greater pressure.
It is not possible to provide an exact number without knowing more specific information such as the pressure, temperature, and composition of the air. However, on average, there are approximately 2.5 x 10^19 molecules in a cubic centimeter of air at sea level.