this post was submitted on 09 Oct 2023
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Science Memes

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top 14 comments
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[–] Kayel@aussie.zone 20 points 1 year ago* (last edited 1 year ago)

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

[–] critical@reddthat.com 11 points 1 year ago

At least twice as much!

[–] joyjoy@lemm.ee 11 points 1 year ago (1 children)

There's also more hydrogen in a glass of water than oxygen.

[–] TonyTonyChopper@mander.xyz 11 points 1 year ago

Only if you're counting atoms. There's more oxygen by weight.

[–] tacosanonymous@lemm.ee 6 points 1 year ago (1 children)

Well, that’s true in our solar system.

[–] doctordevice@lemm.ee 7 points 1 year ago

Ours is the only Solar System, named after our star Sol. Others are generically called star systems or stellar systems.

[–] Spzi@lemm.ee 5 points 1 year ago

Who else counted the fingers before reading the text? I save you the hassle, it's 5.

[–] thepianistfroggollum@lemmynsfw.com 3 points 1 year ago* (last edited 1 year ago) (2 children)

Alright, I know where they went wrong here. There are more hydrogen atoms in a glass of water than stars in the universe.

There are about 1.58 x 10^25 hydrogen molecules in 8oz of water, and there are an estimated 10^22 - 10^24 stars in the universe.

Edit: super script markdown wasn't working

[–] Dave@lemmy.nz 15 points 1 year ago* (last edited 1 year ago) (1 children)

Is it wrong? I'll do some complex math, so feel free to ask follow up questions.

Hydrogen atoms in one molecule of water: 2

Stars in the entire solar system: 1

2 is larger than 1 [citation needed]

[–] thepianistfroggollum@lemmynsfw.com 1 points 1 year ago (1 children)

I'm sorry for your poor reading comprehension.

[–] chatokun@lemmy.dbzer0.com 4 points 1 year ago (1 children)

... Read the image again. Go on.

Read my comment explaining the mistake they made. Go on.

[–] TonyTonyChopper@mander.xyz 2 points 1 year ago

a hydrogen molecule is H2, this is about water

[–] 4am@lemm.ee 2 points 1 year ago

Did they read “a mole” and misinterpret it as “molecule” when writing the headline?