The mass of half mole of electrons is about : (Given : Mass of Electron = 9.1 × 10^-28g)
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​​​​The mass of half mole of electrons is about : (Given : Mass of Electron = 9.1 × 10-28g)

(A) 0.546 mg

(B) 0.273 mg

(C) 1.092 mg

(D) 4.55 mg

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The mass of half mole of electrons is about 0.273 mg.

So, Correct option is (B).

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