Just wondering how to analyse mercury in the presence of cobalt by atomic absorption analysis given that both elements emit and absorb radiation at 235.65nm.
I know that mercury isj examined using cold vapour atomic absorbtion analysis... but knowing this still doesn't help?
Any hints would...
[b]1. I have a relatively simple question, but I can't think of the answer.
A high bp hydrocarbon (X) is obtained by the fractional distillation of crude oil. (X) is then heated in the presence of silicate materials. only 3 new hydrocarbons were from this proces.
All I want to know is what...
Yeah I just tried to use that and still got it wrong its so frustrating! I will go and see my lecturer now and hopefully he can help. Can u see anything wrong with my process?
You burn 103.4 mg of phenol in a calorimeter of heat capacity 1,483 J K-1 and the temperature rises by 1.83 oC. Determine the molar heat of combustion for phenol in kJ mol-1. The molar mass of phenol is 94.12 g mol-1
Ccal=deltaH/ deltaT
This is what I did.
n=.1034/94.12
=1.09859E-3mol...
You burn 136.8 mg of naphthalene in a calorimeter and the temperature of the calorimeter rises by 3.29 oC. Determine the calorimeter heat capacity in J K-1. The molar mass of naphthalene is 128.18 g mol-1
This is a question from a quiz I have to do.
this is wat I did.
Ccal=delta H/delta...
I did an experiment in one of the labs and I have a question I need to figure out.
The experiment was the porduction of p-acetylaminotoluene, from p-toluidine.
My question is we used acetic acid and acetic anhydride, but which is the acetyalting species.
I thought of looking at the...
This is just a general question that I hope someone can answer.
Why do we add alkali before extraction rather than afterwards?
This is in the experiment I recently did, which was the preparation of p-Toluidine?
This was my main thought... that it helps to saturate the solution so that when...
yeah okay wat I also did was letting u=x^7, du=7x^6 which is du/7=x^6
Then I got int 1/7(lnu^1/7)du
Then I used log laws and so I then had 1/49 int (lnu)(du)
I ended up gettin the answer (x^7lnx)/7 - (x^7)/49 + C
Is this rite?