Calculate of molecular formula from vapour pressure
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An organic compound contains 71.7% carbon, 6.7% hydrogen, 10.4% nitrogen and 11.8% oxygen by mass. Given that its vapour density is 67.5, determine its empirical formula and molecular formula.
From the mass percentages, I have found out that the empirical formula is C8H9NO. However, to find the molecular formula we usually require the molecular mass.
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