# What volume does have the Planck mass of hydrogen at normal conditions?

What volume does have the Planck mass of hydrogen gas at normal conditions?

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Why can't you just calculate it? – Javier Jun 14 '14 at 13:25

Planck mass is approximately 21.7651 µg

Mass of hydrogen molecule is 2 amu

1 mole of hydrogen at STP has a mass of 2g, and a volume of ...

Divide. Enjoy.

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My calculation shows, 0.24 liters – Anixx Jun 14 '14 at 15:46
Micro is $10^{-6}$ – Floris Jun 14 '14 at 17:18
Then 0.24 milliliters, which is 0.24 of a cubic centimeter. – Anixx Jun 14 '14 at 17:20
Pretty close: Wolfram alpha makes it 0.26 ml – Floris Jun 14 '14 at 18:18