Polyatomic ions:  ,
,  ,
,  ,
,  ,
,  , and
, and 
Monatomic ions:  ,
,  , and
, and 
<h3>Monoatomic vs Polyatomic Ions</h3>
In chemistry, monoatomic ions are ions that consist of only a single type of atom. They are usually positive or negatively charged and are otherwise known as simple ions. Examples include   ,
,  , and
, and 
Polyatomic ions, on the other hand, are ions that consist of more than one atom, unlike monoatomic ions. The two or more atoms are covalently bonded and the entire structure behaves like a single chemical entity in reactions. Polyatomic ions are otherwise known as molecular ions. 
Examples of polyatomic ions are   ,
,  ,
,  ,
,  ,
,  , and
, and 
Thus, from the diagram:
- Polyatomic ions:  , , , , , , , , , and , and 
More on ions can be found here: brainly.com/question/14982375
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Answer:
The mole fraction of ethanol is 0.6. A 10 mL volumetric pipette must be used for to measure the 10 mL of ethanol. The vessel should be clean and purged.
Explanation:
For calculating mole fraction of ethanol, the amount of moles ethanol must be calculated. Using ethanol density (0.778 g/mL), 10 mL of ethanol equals to 7.89 g of ethanol and in turn 0.17 moles of ethanol. The same way for calculate the amount of water moles (ethanol density=0.997 g/mL). 2 mL of water correspond to 0.11. The total moles are: 0.17+0.11=0.28. Mole fraction alcohol is: 0.17/0.28=0.6
 
        
             
        
        
        
Answer:
Chemical Classification	Carbonate
Explanation:
 
        
             
        
        
        
The average temperature of the ocean surface waters is about 17 degrees Celsius (62.6 degrees Fahrenheit).
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It is important for the pH of blood to remain constant because your blood would ionize and burn up if the pH wasn't constant. And if the pH was too high, bacteria ( good and bad, and foreign) would end up dying, as well as yourself.