pV = nRT
p = nRT/V
p= 1 x 0.08205 x 1000/ 2
p = 41.025 Pa
Edit: The unit should be atm instead of Pa, as pointed out by a nice human being.
The correct answer would be C2H60
It is effected by diffusion (the power of smell and wind spread) but a solid is not.
The answer is six because it is in group six A on the periodic table.
