Question

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

• A. 0.1673
• B. 1.673
• C. 16.73
• D. 167.3

Answer 1

Answer: (B)

1.673

Answer 2

If ${{10}^{20}}$ grains are distributed in 1 s,
$6.023\times$ ${{10}^{23}}$ grains will be distributed in
$\frac{6.023\times {{10}^{23}}\times 1}{{{10}^{20}}}=6023s=1.673\,hr$