Answer to Question #230169 in Physics for jen

Question #230169

  If one could count one molecule per second, how many years would it take to count the molecules in a mole? (The number of molecules in a mole is Avogadro’s number NA = 6 x 1023.)



1
Expert's answer
2021-08-27T08:26:15-0400

In one mole there are 6×10236 \times10^{23} molecules. So, the time for counting

6×1023s=6×10231s365.2422243600syear6 \times10^{23}\:\rm s=6 \times10^{23}\: \frac{1\: s}{365.2422*24*3600\frac{s}{year}}

=1.9×1016years=1.9\times10^{16}\:\rm years


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