Aluminum or glass I think
The given example is a chemical reaction.
The contents (separated as reactants and products) :

The written reaction is :

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<em>Good luck on your studies!</em>
They are examples of physical<span> contaminants .</span>
Answer:
500
Explanation:
from the average and if yoy multiple and then add your % and x you would get 500 to 600
Answer:
Explanation:
Structure of the 2,2,4,4-tetramethyl-3-pentanone is give in the attachment
In 2,2,4,4-tetramethyl-3-pentanone, no alpha hydrogen is present, therefore, enol form is not possible and hence, exist only in keto form.
Explanation for existence of cyclohexa-2,4-diene-1-one only in enol form:
keto form of cyclohexa-2,4-diene-1-one not aromatic and hence less stable.
Whereas enol form it is aromatic which makes it highly stable. that's why cyclohexa-2,4-diene-1-one exists only in enol form.