Answer: A mechanical wave is a disturbance in matter that transfers energy through the matter. A mechanical wave starts when matter is disturbed. A source of energy is needed to disturb matter and start a mechanical wave.
Percentage recovery gives us an idea of the amount of pure substance recovered after the chemical reaction. Percentage recovery can be more than 100 % or less than 100 %. Usually, in any experiment performed the weight percentage recovery will be less than 100. Percent recovery values greater than 100 show that the recovered compound is contaminated.
Amount of acetaminophen initially taken = 350 mg
Amount of acetaminophen obtained after recovery =185 mg
![Weight percentage recovery =\frac{mass recovered}{mass originally taken}*100](https://tex.z-dn.net/?f=Weight%20percentage%20recovery%20%3D%5Cfrac%7Bmass%20recovered%7D%7Bmass%20originally%20taken%7D%2A100)
= ![\frac{185 mg}{350 mg}*100](https://tex.z-dn.net/?f=%5Cfrac%7B185%20mg%7D%7B350%20mg%7D%2A100)
= 52.9%
Explanation:
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have not yet learnt chemistry so sorry