# A certain organic compound in the vapor state has a density of 3.27 g/L at 95°C and 758 torr...?

A certain organic compound in the vapor state has a density of 3.27 g/L at 95°C and 758 torr. What is the molecular weight? If the compound contains 24.2% C, 4.1% H, and 71.7% Cl, what is the molecular formula?

we can use the formula
d = M p /RT

M = d RT / p

p = 758 / 760 = 0. 997 atm
T = 95 + 273 = 368 K

M = 3.27 x 0.0821 x 368 / 0.997 = 99.1 g/mol

We consider 100 g of this compound : we have 24.2 g of C , 4.1 g of H and 71.7 g of Cl

24.2 / 12.011 =2.01 moles C
4.1 / 1.00794 = 4.07 moles H
71.7 / 35.453 = 2.02 moles Cl

we divide for the smallest number and we get the empirical formula
C H2Cl ( mass = 51 g/mol)
99.1 / 51 = 1.9

the molecular formula is
C2H4Cl2
may be CH3CHCl2 or CH2ClCH2Cl

The answers post by the user, for information only, FunQA.com does not guarantee the right.

More Questions and Answers:
• What does the period of elements on a periodic tabl show you in terms of electronic stucture?
• The boiling point of a liquid occurs...?
• Does pewter ever turn gold in color? A religious store sells a pewter bracelet which is purported to turn?
• What is the main factor not favouring an SN2 reaction mechanism?
• What is height of a column of water?
• Which substance is oxidized in this reaction?
• Chloroform Gas in the Dishwasher- Harmful?
• Tell me the names of any 4 scientists?
• Chemistry questions?