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प्रश्न
Calculate the number of electrons which will together weigh one gram.
संख्यात्मक
उत्तर
Mass of one electron = 9.10939 × 10-31 kg
∴ Number of electrons that weigh 9.10939 × 10-31 kg = 1
Number of electrons that will weigh 1 g = (1 × 10-3 kg)
`= 1/(9.10939 xx 10^(-31)) xx (1xx10^(-3) " kg")`
`= 0.1098 × 10^(-3 + 31)`
= 0.1098 × 1028
= 1.098 × 1027
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पाठ 2: Structure of Atom - EXERCISES [पृष्ठ ६९]
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