Density of a gas was found to be 5.59K at 27 degree Celsius and 2 bar pressure.Calculate its molecular mass.
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The molecular mass of the gas will be 69.7 grams.
Explanation :
From he ideal gas law we know that,
PV = nRT
where P = pressure = 2
V = volume
n = number of moles = mass/molecular mass = m/M = ρV/M
R = gas constant = 0.0831
T = temp in kelvin = 27 + 273 = 300 k
Rearranging the eqn we get,
PV = (ρV/M) x R x T
=> M = ρRT/P
= 5.59 x 0.0831 x 300/2
= 69.7 grams
Hence the molecular mass of the gas will be 69.7 grams.
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