Molecular Formulas? (Can't think of a title)

So I'm doing this really silly homework about ibuprofen.

Anyway, I've deduced that the question is asking me to split up CH7NO2 into two compounds: one with an Mr of 19 and the other with 33.
It's probably staring me in the face but it's doing my head in!

Thank youu!

Reply 1

MichaelScofield

1

how about "Molecular Formulae"?

Reply 2

Laura373

OP

16

And that's why I don't do A Level English. :P

Reply 3

Kyle_S-C

12

What's the molecule you need to break up? I can't see how you get an Mr of 19 from anything containing carbon...

Reply 4

cptbigt

7

Laura373

So I'm doing this really silly homework about ibuprofen.

Anyway, I've deduced that the question is asking me to split up CH7NO2 into two compounds: one with an Mr of 19 and the other with 33.
It's probably staring me in the face but it's doing my head in!

Thank youu!

19+33 = 52
Mr of CH7NO2 = 65

:confused:

Reply 5

Laura373

OP

16

ok then I must be doing it completely wrong.

In the last column - I've looked at the total formula, and worked out that CH7NO2 are missing from the two remaining cells in the column.

Reply 6

EierVonSatan

21

ooooh right, very unusual question...

19 = H₃O and 33 = NH₃O - they contribute nothing to the final molecule

Reply 7

Laura373

OP

16

But with the other two columns the molecules all add up to the final molecule...?

and I'm sorry to be a pain, but there's another table after this and I'm just like O.o