Chemical quantities (AS)
Read our general notes on Risk Assessment
An unimaginably large number
Can you get your mind around numbers as big as the Avogadro constant?
Imagine that you wanted a pile of sand containing 6 x 1023 grains of silica. Then suppose that a builders' merchant agreed to deliver a lorry load of sand every ten minutes day and night. Guess how long it would take to deliver all the sand. Then try this web site to find out how to estimate the answer.
Now have a look at the Powers of Ten web site for another perspective on large numbers.
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updated: 18 August 2003
