It turns chemical into electricity 
        
                    
             
        
        
        
Answer:
B?
Explanation:
In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles. Use the mass of the hydrogen gas to calculate the gas moles directly; divide the hydrogen weight by its molar mass of 2 g/mole. For example, 250 grams (g) of the hydrogen gas corresponds to 250 g / 2 g/mole = 125 moles.
 
        
             
        
        
        
Potassium outermost electron occupy "4s" orbital
        
                    
             
        
        
        
The sample with the largest number of oxygen atoms will be calcium perchlorate.
<h3>Number of atoms in a compound</h3>
Since we are not looking at the number of moles, the mass of the compounds has no bearing on the number of atoms of oxygen.
- The chemical formula for carbon dioxide is  . Thus, it has 2 atoms of oxygen. . Thus, it has 2 atoms of oxygen.
- The chemical formula for potassium chlorate is  . Thus, it has 3 oxygen atoms. . Thus, it has 3 oxygen atoms.
- The chemical formula for calcium perchlorate is  . Thus, it has 8 atoms of oxygen. . Thus, it has 8 atoms of oxygen.
- The chemical formula for sodium hydroxide is NaOH. Thus, it has 1 atom of oxygen.
Therefore, the compound with the largest number of oxygen atoms is calcium perchlorate.
More on the number of atoms in compounds can be found here: brainly.com/question/1686912
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