Weight and mass are related in a consistent manner and you can indeed derive one from the other. Speaking of the weight of the earth is ambiguous, however, while it's easy to figure out the weight of the average avocado.
Note that I said "Avocado" not "Avogadro". It's an old joke, from when I was an undergrad, so probably you haven't encountered it. Since 6.022 x 1023 is less symmetrical to the mind than 6.023 is, we referred to the latter with it's slight difference as "Avocado's number". For everyday purposes, it's close enough, even if it doesn't quite work in your chemistry lab. Note that they both round to 6.02 in any case. ;p
And if for some reason it still isn't obvious, the entire thread was facetious.
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branchandroot
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Date: 2007-06-27 06:17 pm (UTC)Note that I said "Avocado" not "Avogadro". It's an old joke, from when I was an undergrad, so probably you haven't encountered it. Since 6.022 x 1023 is less symmetrical to the mind than 6.023 is, we referred to the latter with it's slight difference as "Avocado's number". For everyday purposes, it's close enough, even if it doesn't quite work in your chemistry lab. Note that they both round to 6.02 in any case. ;p
And if for some reason it still isn't obvious, the entire thread was facetious.