If $36.4 \times 10^{- 15}$ g of mass is transferred when fur is rubbed with silk, find the number of electrons lost by fur? (mass of electron $= 9.1 \times 10^{- 31}$ kg).

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Solution

Step 1: Given data
Mass of $1$ electron $= 9.1 \times 10^{- 31} k g$
$= 9.1 \times 10^{- 28} g .$
Step 2: Finding the number of electrons lost by fur
If $36.4 \times 10^{- 15}$ g of mass is missing then the number of electrons that have left the fur is $= \frac{36.4 \times 10^{- 15}}{9.1 \times 10^{- 28}}$
$= 4 \times 10^{13}$ electrons.
Hence, the number of electrons lost by fur is $4 \times 10^{13}$

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If 36.4×10-15 g of mass is transferred when fur is rubbed with silk, find the number of electrons lost by fur? (mass of electron =9.1×10-31 kg).

If $36.4 \times 10^{- 15}$ g of mass is transferred when fur is rubbed with silk, find the number of electrons lost by fur? (mass of electron $= 9.1 \times 10^{- 31}$ kg).