can you answer this A2 aromatic compounds chemistry question?

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anonymousme123
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A monosubstituted aromatic hydrocarbon X when vapourised at 293K and 100kpa, 10.5g of the compound occupies 2.44dm^3.
Use this information to find a structure for X.

So far I've got, no. of moles (pv=nRT) 0.100...
10.5 / 0.1 = 104.82...
and I'm struggling to find a structure, phenylethene has a mr of 104 & ethylbenzene has 106.
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Bjornhattan
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Was there no other information?
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anonymousme123
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nope!

(Original post by Bjornhattan)
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