3.11 i'm not sure about measurements maybe like 3.11kg/cm^3
The correct answer to this question is that the length of 14 is it’s half Which would be 7
A hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force. Atomic hydrogen constitutes about 75% of the baryonic mass of the universe.
I'm pretty sure the answer is 0.833 atm.
Hope I helped! <3
-cara