Question

then why explain why when the bottle of perfume is open in a room when when smell is event from a concert distance​

Answer 1

Answer:

the smell or the aroma of perfume can reach severeal meters away due to diffusion of gas particles in it.....

Explanation:

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Answer 2

this is because the air particles have weak forces of attraction due to which the the gas of the perfume goes between the particles and it can be smelt from the concrete distance.