How much time would it take to distribute one Avogadro number of wheat grains,

Question:

How much time would it take to distribute one Avogadro number of wheat grains, if 1010 grains are distributed each second?

Solution:

Avogadro number $=6.02 \times 10^{23}$

Thus, time required

$=\frac{6.02 \times 10^{23}}{10^{10}} \mathrm{~s}$

$=6.02 \times 10^{23} \mathrm{~s}$

$=\frac{6.02 \times 10^{23}}{60 \times 60 \times 24 \times 365}$ years

$=1.909 \times 10^{6}$ years

Hence, the time taken would be $1.909 \times 10^{6}$ years.

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