What is the smallest level of organization?

Aperfume bottle is dropped in the corner of a room. the odor of the perfume can be detected on the other side of the room. which statement best describes this observation?

How many moles of sulfur dioxide are in 2.26 × 10^33 sulfur dioxide molecules?

All chemicals, even safe chemicals, such as sodium chloride( table salt), are toxic if exposure is high enough. (true or false)