Homework Help: Chemistry

Posted by Beth on Monday, July 26, 2010 at 6:10pm.

Draw the condensed structural formula for ethylbenzene, 1,3 dichlorobenzene,1,2 and 4-trimethylbenzene ? Any help would be appreciated, thank you

I also was wondering if anyone could let me know if I am going in the correct direction with this question>
Acetylene gas reacts with oxygen and burns at 3300 C in an acetylene torch. Write the balanced equation for the complete combustion of acetylene.

2C2H2 +5 O2 = 4 CO2 +2 H2O (think this is correct) ?

Chemistry - DrBob222, Monday, July 26, 2010 at 6:18pm
We can't draw structures on the board. sorry. The C2H2 equations looks ok to me.
Chemistry - Beth, Monday, July 26, 2010 at 6:26pm
Ok, it looks good then? Thank you for looking it over.

Do you know where I would be able to recieve online assistance with drawing structures? Thank you.
Chemistry - DrBob222, Monday, July 26, 2010 at 7:50pm
No. The best I have been able to do is to type in names to google and hope the links there will show the structure.
By the way, there must be an easier way to identify functional groups. Do you have a table of functional groups. They are in almost in organic chemistry book and there must be dozens of sites on the Internet. If you can't find one I shall be happy to find one for you.
Chemistry - Beth, Monday, July 26, 2010 at 8:52pm
I do not have any table of functional groups. I am out of the city w/o a textbook visiting an ill parent.
I will look online.

I think I have it though regarding functional group. Any OH-C bond is an alcohol. O would be ether due to C-0-C bond. C-SH bond would be thiol.

But I still really need assistance with drawing structures.So no online help for that it looks like...
Chemistry - DrBob222, Monday, July 26, 2010 at 11:26pm
Yes, but remember OH on alkane is an alcohol; an OH on a benzene ring(or rings) is a phenol.

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