Question

How much time would it take to distribute one Avogadro number of wheat grains, if ${10}^{10}$ grains are distributed each second?

Answer 1

Avogadro number = $6.02\times {10}^{23}$
Thus, time required
$=\frac{6.02\times {10}^{23}}{{10}^{10}}s=6.02\times {10}^{13}seconds$

=$\frac{6.02\times {10}^{13}seconds}{\frac{60sec\times 60mins\times 24hours\times 365days}{year}}$

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