Comments on: O Level Chemistry: Mole Concepts / Mole Calculations

By: enock mugabi

enock mugabi — Thu, 29 Sep 2011 13:48:10 +0000

First find out the mass of the ethen molecue at room temperature and pressure.
then you devide the 10 gramms of the molecue[ethen] BY the RMM ,and then multiply it by 24. so as to get the volume given out by the 10 gramms.

By: lol

lol — Thu, 17 Mar 2011 20:24:52 +0000

atoms they are the building units for the matter atom is the name for the individual particle.(they are for one element)
molecules are like h2 which means twoo atoms or more for a specific element.

By: sean

sean — Fri, 24 Apr 2009 08:03:58 +0000

Hi rija,

check out my comments above to Varda.

Thanks.

Try it out using the questions given to you by your school teachers.

Let me know how it works for you!

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author
WINNERS Education Group

“Experience Learning with A Difference”

By: sean

sean — Fri, 24 Apr 2009 08:03:21 +0000

Hi Varda,

Thank you for your comment.

There is indeed a way to change concentrations from mol/dm3 –> g/dm3

What you need to do is to use the MR involved. In this case, it will be MR of C2H6.

Next, apply the following formula: Conc. (g/dm3) = Conc. (mol/dm3) x MR

Try it out using the questions given to you by your school teachers.

Let me know how it works for you!

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author
WINNERS Education Group

“Experience Learning with A Difference”

By: sean

sean — Fri, 24 Apr 2009 07:55:31 +0000

Sean : ” Your answer is correct but just ensure that you include your units with your answer. “’

Regards,
Sean Chua
Master Trainer & Author
WINNERS Education Group

“Experience Learning with A Difference”