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formula to find density of a vapor?
The compound pentane C5H12 is easily vaporized at room temperature. If a vapor exerts a pressure of 234 mm Hg in a flask at 25 degrees Celsius, what is the density of the vapor?
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1 Answer
- Anonymous9 years agoFavorite Answer
Let's say we're looking to approximate the vapor density of propane (C3H8). The MW of C3H8 is about (3 x 12) + (8 x 1) = 44.
If we divide the MW of C3H8 by the MW of air (about 30) ---> 44 / 30 = 1.47.
The approximate vapor density of C3H8 is 1.47.
Hence, Vapor Density = MW of a gas / MW of air.