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bcjochim07
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Homework Statement
A nebula-- a region of the galaxy where new stars are forming contains a very tenuous gas with 100 atoms/ cm^3. This gas is heated to 7500 K by the uv radiation from nearby stars. What's the gas pressure in atm?
Homework Equations
The Attempt at a Solution
100 atoms * 1mol/6.022*10^23 atoms = 1.02 * 10^-16 moles
1 cm^3 * (1m/100cm)^3 = 1 * 10^-6 m^3
R= 8.31 J/mol K
pV=nRT
p(10^-6 m^3) = (1.02 * 10^-16 mol)(8.31)(7500 K)
p= 1.03 * 10 ^-11 Pa = 1.02 * 10 -16 atm Does this seem too small to you?