I think its becuse the shoreline is shalow water that is warmed by the sun? ...... I may be rong
This answer is 24 because 2.17 x 10 -8 is 24 so that would be your answer
They are organized into crystals hope i helped
Answer : The given compound belongs to ether and alcohol.
Explanation :
The chemical formula of the given compound is, 
First we have to calculate the degree of unsaturation.
Formula used:
Degree of unsaturation = 
where,
C = number of carbon
H = number of hydrogen
N = number of nitrogen
X = number of halogen
Degree of unsaturation = 
The degree of unsaturation is, 0 that means there is no double or triple bond in the compound only single bond is present between the atoms.
Thus, the given compound belongs to ether and alcohol.
the heat of reaction for a chemical reaction