Protons and neutrons.
Note: They probably are ABOUT the same mass. Don't think they are exactly the same.
Hope this helps!
Answer:
chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic.
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Molar mass of 


<u>As we know</u>–
1 mol =
formula units
1 mol
= 143.092 g =
formula units
Henceforth –
formula units
–


