The mass of an electron in amu is :

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5.48 × 10-3 amu

9.109 × 10-28 amu

5.48 × 10-4 amu

9.109 × 10-31 amu

answer is C.

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Detailed Solution

Mass of electronic in grams = 9.1×10-281 amu = 1.67×10-24 gramsMass of electrons =9.1×10−281.67×10−24=5.4×10−4amu

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