The melting point of the sample if it is not dried completely after filtering the recrystallized product will have a broad range and will occur at lower range than the actual value.
What is melting point?
Melting point is the temperature at which the solid form of a given substance changes to the liquid form at atmospheric pressure. It is important because, by using the physical property of a substance the substance can be identified.
The sharp range melting point of the substance indicates the purity of the substance. If the sample is not dried completely after recrystallisation, the melting point will have a broad range.
Therefore, if the sample given is not dried completely, it will be impure and the decreases the melting point of the substance. So the actual melting point of the substance cannot be determined.
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Explanation:
The minimum sampling rate allowed by the sampling theorem (fs = 2W) is called the Nyquist rate ... systems involving the use of continuous time functions of finite bandwidth. ... The sampling process is usually described in a time domain. This is an operation that is basic to digital signal processing and digital communication ...
To Find :
How many moles are in 
atoms of iron.
Given :
We know, 1 mole of any element or compound contains exactly 
( Avogadro's Number ) atoms/compound .
Now, 
So, number of moles in given number of atoms are :
Hence, this is the required solution.
