The mass of a mol of proton and electron, Physics

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The mass of a mol of proton and electron is:

(1) 6.023x 1023 g

(2) 1.008g and 0.55mg

(3) 9.1x 10-28kg        

(4) 2gm

Ans: (2) 1.008g  and 0.55mg 


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