Answer:

Explanation:
Number of molecules of water = 
= Avogadro's number = 
Number of moles is given by


The number of moles of water is
.
The answer to this question would be: resistance
When a patient developing a resistance to a certain drug, the same amount of doses will not exert the same effect as before. The effect will be lower, thus the doctor will need to increase the dose to increase the effect
State the periodic law and explain how it relates to the periodic table.
The distance from one crest to another crest or from one trough to another trough is called wavelength. Hope it helps