this post was submitted on 09 Oct 2023
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Science Memes

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How many? (lemmy.ca)
submitted 1 year ago by [email protected] to c/[email protected]
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[–] [email protected] 22 points 1 year ago* (last edited 1 year ago) (2 children)

Ignoring the joke.

A metric cup is 250 ml.

250 ml = 250 g (the density of water is intentionally 1.000 g / ml)

Water ~= 18 g/mol ( H 1.008 g/mol, O 16.something g/mol)

250 g / 18 g/mol = 13.8 mol

13.8 mol * 6 * 10^23 atoms/mol = 8.33 * 10^24 molecules of water

And there are two atoms of H in one molecule of water, so 1.66*10^25 atoms of hydrogen in a glass of water.

That's a lot

[–] [email protected] 12 points 1 year ago

The craziness thing about all of this is that there is actually such a thing as "a metric cup"