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#2676
Karen Chaffee
Participant

Counting at a rate of one atom per second, for 48 hours per week, it would take the entire population of the world 10 million years in order to reach Avogadro’s number (5).

In order to obtain Avogadro’s number of grains of sand, it would be necessary to dig the entire surface of the Sahara desert (whose area of 8 X 106 km2 is slightly less than that of the United States) to a depth of 2 meters (6).

References:
(1) D. Todd, “Five Avogadro’s Number Problems”, Journal of Chemical Education, 62, 76, 1985.
(2) D. Kolb, “The Mole”, Journal of Chemical Education, 55, 728-732, 1978.
(3) P.S. Poskozim, J.W.Wazorick, P. Tiempetpaisal and J.A. Poskozim, “Analogies for Avogadro’s Number”, Journal of Chemical Education, 63, 125-126, 1986.
(4) F.A. Bettelheim and J. March, Introduction to General, Organic and Biochemistry, 2nd edition, New York, W.B. Saunders, 1988.
(5) W.L. Masterton, J. Slowinski and C.L. Stanitski, Chemical Principles, 6th edition, New York, W.B. Saunders, 1985
(6) Henk van Lubeck, “How to Visualize Avogadro’s Number”, Journal of Chemical Education, volume 66, page 762, September 1989.