Answer:

Explanation:
To convert from moles to particles, we must Avogadro's Number. 

This number tells us the number of particles (atoms, ions, molecules, etc.) in 1 mole of a substance. In this case, it is the particles of calcium in 1 mole of calcium. 

We can use Avogadro's Number as a ratio or fraction. 

Multiply this by the given number of particles (3.57*10³²). 

Flip the fraction so the particles of calcium will cancel out. 




There are <u>592,826,303.6 moles</u> of calcium in 3.57*10³² particles of calcium.
 
        
             
        
        
        
Answer :  The solubility of this compound in g/L is  .
.
Solution : Given,

Molar mass of  = 114.945g/mole
 = 114.945g/mole
The balanced equilibrium reaction is,
                       
At equilibrium                         s       s
The expression for solubility constant is,
![K_{sp}=[Mn^{2+}][CO^{2-}_3]](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BMn%5E%7B2%2B%7D%5D%5BCO%5E%7B2-%7D_3%5D)
Now put the given values in this expression, we get

The value of 's' is the molar concentration of manganese ion and carbonate ion.
Now we have to calculate the solubility in terms of g/L multiplying by the Molar mass of the given compound.

Therefore, the solubility of this compound in g/L is  .
.
 
        
             
        
        
        
Answer:
Carbon is also found in the atmosphere where it's a part of carbon dioxide gas emitted when fossil fuels are burned and when living organisms breathe. It's in organic matter in the soil, and it's in rocks. But far and away the most carbon on Earth is stored in a surprising place: the ocean. Carbon is also found in the atmosphere where it's a part of carbon dioxide gas emitted when fossil fuels are burned and when living organisms breathe. It's in organic matter in the soil, and it's in rocks. But far and away the most carbon on Earth is stored in a surprising place: the ocean.
Hope this helps! 
 
        
             
        
        
        
Protons : positive charge , about same mass as neutrons , in the nucleus 
neutrons : no charge , about the same mass as a proton , in the nucleus 
electrons : negative charge , less mass than protons and neutrons , in orbitals outside of the nucleus