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  4. How much time (in hours) would it take to distribute one Avogadro number of wheat grains if 1020 grains are distributed each second?

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Q. How much time (in hours) would it take to distribute one Avogadro number of wheat grains if $10^{20}$ grains are distributed each second?

NTA AbhyasNTA Abhyas 2022

Solution:

If $10^{20}$ grains are distributed in one sec,
$6.023\times 10^{23}$ grains will be distributed in
$\frac{6.023 \times 1 0^{23} \times 1}{1 0^{20}}=6023$ $sec = 6023/3600 \, =1.673$ $hrs$