Question on equilibrium! urgent!
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Question on equilibrium! urgent!

[From: ] [author: ] [Date: 11-10-06] [Hit: ]
6 mol/L, 0.4 mol/L and 1.2 mol/L.......
Toluene (methyl benzene), C7H8(g) is an important solvent and precursor to many other organic compounds such as trinitrotuluene (TNT). It can be produced according to the following equilibrium:
C7H14(g)= C7H8(g)+ 3H2(g)
When 3 mol of of C7H14(g) was introduced into a 1 L container, 1.2 mol of H2 (g) was produced at equilibrium.
What were the equilibrium concetrations, in moll-1, of C7H8 and C7H14?

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In equilibrium the following numbers of moles are found:
C7H14: 3 mol -0.4= 2.6 mol
C7H8: 0.4 mol
H2: 1.2 mol
Because volume is 1 L and because it is constant concentations are 2.6 mol/L, 0.4 mol/L and 1.2 mol/L.
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