3 mg of vape is equivalent to 6.666666666666666 puffs of a cigarette.
Answer analysis: The key to this question is to understand the relationship between vape and the nicotine content of cigarettes.
The nicotine content of a vape is 3 mg, and the number of puffs of a cigarette is assumed to be 1 puff.
According to the meaning of the question, we need to find the nicotine content of a cigarette, and then find out how many puffs are equivalent to it based on the ratio of the nicotine content of the vape and the cigarette.
It is known that the nicotine content of a cigarette is 20 mg
Then, the ratio of nicotine content in vape and cigarettes is:
20 / 3 = 6.6666666666666667
Therefore, the number of puffs equivalent to one cigarette is:
6.666666666666667
So, 3 mg of vape is equivalent to 6.666666666666667 puffs of a cigarette.