Given volume of hydrogen = 25 L
Standard temperature = 273 K
Standard pressure = 1 atm
R is gas constant = 0.08206 L.atm/(mol.K)
Plugging in the values in ideal gas equation and solving for moles of hydrogen (n):
n = 1.12 mol
They are all rocks and they are all solid
The hypothesis gets proven wrong or right. The new information will either support the hypotheses or go against them.