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01friends01 Goldie
01friends01
01friends01

Joined: 27 March 2011
Posts: 1173

Posted: 31 March 2011 at 2:27am | IP Logged
please explain how can i make a 30 degree angle with compass.
akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5265

Posted: 31 March 2011 at 3:16pm | IP Logged

Click the following link to know how to draw 30 deg angle with compass. Click next. Read the instruction and see the step. Once you have seen that step, then click Next again. Continue like that till all steps are completed.

 
Note: If you want, I can explain you the steps in yahoo messenger doodle or in some whiteboard. PM me if you need that.
 

The following 1 member(s) liked the above post:

01friends01

01friends01 Goldie
01friends01
01friends01

Joined: 27 March 2011
Posts: 1173

Posted: 04 April 2011 at 2:24am | IP Logged
Originally posted by akhl

Click the following link to know how to draw 30 deg angle with compass. Click next. Read the instruction and see the step. Once you have seen that step, then click Next again. Continue like that till all steps are completed.

 
Note: If you want, I can explain you the steps in yahoo messenger doodle or in some whiteboard. PM me if you need that.
 


thank you so much.Big smile
cityoflights IF-Veteran Member
cityoflights
cityoflights

Joined: 11 September 2008
Posts: 12835

Posted: 07 April 2011 at 6:49pm | IP Logged
Hi I need Chemistry help. It's prob a simple problem, but I can't get the answer, lol.
 
Can someone tell me how to do this along with the answer? (hehe)
 
When 60 grams of Iron (111) chloride hydrate is heated, 24 grams of water are given off. What is the chemical formula for the hydrate?
 
This is urgent (: Thank you soo muchh!


Edited by aishi.muffin - 07 April 2011 at 6:49pm
akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5265

Posted: 08 April 2011 at 5:12am | IP Logged
Originally posted by aishi.muffin

 
When 60 grams of Iron (111) chloride hydrate is heated, 24 grams of water are given off. What is the chemical formula for the hydrate?
 
 
Formula of the hydrate is of the form FeCl3.xH2O
Therefore moles of the hydrate = moles of FeCl3
 
Molecular weight of FeCl3 = 162 g/mol
Molecular weight of water = 18 g/mol
 
In 60 grams of the hydrate:-
Amount of water of crystallization = 24 g
Amount of FeCl3 = 60-24 = 36 grams
Moles of FeCl3 = 36/162 = 2/9 = moles of the hydrate 
Moles of H2O = 24/18 = 1.5
 
2/9 mol hydrate contains 1.5 mol water of crystallization
Therefore 1 mol hydrate contains 1.5/(2/9) = 1.5*9/2 = 7 (rounded to nearest integer) mol water of crystallization
 
Formula of the hydrate: FeCl3.7H2O
Ans: FeCl3.7H2O
 
akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5265

Posted: 20 April 2011 at 12:41am | IP Logged

It has been more than 9 years since the attack on the word trade center towers.

I know a student in Singapore. He needs materials on
1. How has the world changed since then as a result of the attack. Give changes from different perspectives, such as political, social, economic.
2. What measures have the countries around the world taken to prevent such an incident from happening again.
 
I gave him some materials based on what I read in media and what I could find from Internet. But the problem is that Internet contains various different points of view - one often contradicting another. Also, I am not sure how authentic some website is.
I need web pages, which answer the above questions in easy to understand way. Also, the web sites should be of reputed organisations.
 
Also, is anybody aware what is meant by "IBL" question?
SweetRozie123 IF-Dazzler
SweetRozie123
SweetRozie123

Joined: 05 September 2009
Posts: 2747

Posted: 25 April 2011 at 4:46am | IP Logged
Hi, I need chemistry help.

The task is:
Investigate the industrial reversible reaction known as the Haber process.
Evaluate how the different factors affect the rates of this reaction.

Or: Use primary data to evaluate how different factors affect Reaction rates for a given Industrial reaction.


I can't find any information for this ^^... if you can, please help!

Thanks,
Rosie.

akhl IF-Rockerz
akhl
akhl

Joined: 30 March 2007
Posts: 5265

Posted: 25 April 2011 at 7:54am | IP Logged
Originally posted by SweetRozie123

Hi, I need chemistry help.

The task is:
Investigate the industrial reversible reaction known as the Haber process.
Evaluate how the different factors affect the rates of this reaction.

Or: Use primary data to evaluate how different factors affect Reaction rates for a given Industrial reaction.


I can't find any information for this ^^... if you can, please help!

Thanks,
Rosie.

 

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