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Welcome to Chemtopper.com - Free Chemistry Help forum.
This forum has been created to help out students who need help in Chemistry. You are welcome to post your questions here which will be posted in no time.
Please feel free to ask questions here and also answers the questions posted by others to help them out.
May 24, 2017, 05:04:24 AM by bhav | Views: 215 | Comments: 1

what volume of ammonia, in dm3 can be made from 30 dm3 of nitrogen and 60dm3 of hydrogen?

all volumes are at same pressure and temp.

reaction goes to completion according to the equation:

N2 + 3h2 --> 2nh3
May 24, 2017, 02:09:15 AM by bhav | Views: 235 | Comments: 2

The fertilizer tri-ammonium phosphate is made from 'phosphate rock' by:
1 reacting the phosphate rock with sulfuric acid. H2SO4 to produce phosphoric acid.H3 PO4
2 reacting the phosphoric acid with ammonia. NH3 , to give tri-ammonium phosphate
If the phosphate rock contains 90% by mass calcium phosphate  from which the overall yield of tri-ammonium phosphate is 95%. calculate the mass of phosphate rock required  to make 1000 tonnes of triammonium phosphate.

April 02, 2017, 09:16:24 AM by APK911 | Views: 352 | Comments: 4


So I was wondering if someone could answer a question for me. We're currently doing titrations, and have a lab tomorrow. If there's a known concentration of Na2CO3 in the conical flask, and an unknown concentration of HCl in the burette, which is the titrant and which is the analyte?

Thank you!
September 15, 2016, 04:04:10 PM by bluecoconut | Views: 615 | Comments: 0

Benzene underwent a Friedel-Crafts acylation reaction followed by a Clemmensen reduction. The product gave the 1H NMR spectrum shown above. What acyl chloride was used in the Friedel-Crafts acylation reaction? Hint: It would be helpful if you first assign a structure to the compound shown in the 1H NMR spectrum.

Can someone help explain how to tell exactly which acyl chloride was used?

NMR spectrum is attached. Thank you.
June 23, 2016, 07:59:32 PM by Knowledgethirst | Views: 799 | Comments: 0

Please Help!
For gold dissolution in Sodium Thiosulfate solution, I have to add FeEDTA at a concentration of 0.002 mole for one liter solution. I have with me Ferric sulfate and EDTA (Ethylenediaminetetraacetic acid) separately. Please advise me how many grams of ferric sulfate and EDTA I have to dissolve into the solution respectively.
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