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

Options

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

Answer

B

Explanation

Time taken to distribute `10^(20)` grains
=1 second
Time taken to distribute `6.022 xx 10^(23)` grains
`=1/10^(20) xx 6.022 xx 10^(23)` seconds
`=(6.022 xx 10^(23))/(10^(20) xx 60 xx 60)` hours
= 1.673 hours,