ChemSiddiqui

so it did work then(at least use to) .....yeh it is a shame it did look like a good program to use

don't know what to suggest....I am sure where[country] you live there will be a british High commision office. your best source of information will be them.

good luck

no herm it didn't. I just said thank you as a gratitute of your intention to help. I did all the calculations myself and filled pages of answer (it wan't just oxalic acid whose fragementation pattern I was after!!!!!!).

well actually i was going through it last night and I figured that we have to convert the wavenumber into frequency in nm so I used the formula V(bar) = 1/Lambda and made lambda the subject and got lambda = 1/V(bar).

That was 1/16300 which equalled 6.134 x 10^-5 cm. To change it into the nm scale i simply divided it by the power of 10 to -15 and the final answer came as 6.134 x 10^-15.

Now I don't know if its the right answer or not but my head said it is.

Hi,

 

Okay. The question is how many moles are there in 2.107 * 10^24 water molecules.

Now I'd say something like 10 because the Avogadro Number is 2,022 * 10^23 and because 10^24 is a lot more then 10^23... But is there a precise way of doing this?

I know this question may seem a little bit stupid but sorry...Just started chemestry :D

 

Thanks in advance

A. The avogadro number/constant isn't 2.022 x 10^23 its 6.02 x 10^23 so please correct your facts.

b. you just have to divide the number by the avogadro constant to get the value.

c. And please don't use comma to denote a 'dot'. Its mathematically wrong.

Good luck and Welcome to the world of chemistry.

Hi I was just wondering if you can help me out on this. Note: this isn't a homework question ok!

How you convert the wavenumber in cm^-1 into nm. I know if it said that you had to convert that wavenumber into nm^-1 it would be X 10^10. You people think that I might have to multiply it by 10^-10?

Any help appreciated.

thanks hermanntrude! Appreciate it!

hi all,

I just wanted to ask what the fragmentation pattern of oxalic acid will be. Its not a homework question so I think its appropriate for this section. I think that the m/z = 17 corresponding to OH will be lost leaving the fragment C2HO+ behind. I can't think of the other fragment for it. Any idea folks!

when i use 12M HCl in the laboratory I find it very concentrated. Not a very good idea to use 12M for zinc becuase that way you will lose a lot of hydrogen and the acid will eat away the metal. Good to hear you have done the experiment though!

delta(small triangle) sign tells you about the difference of anything. So when its delta E it means difference in energy that occured from forward to the backward reaction. The formula is delta E = bond energy of reactants - bond energy of products. Look out the bond energy data from a chemistry data table and work out delta E urself

religion and science mix perfectly in my opinion and I don't think this question would simply put a lock to this thread just because it concerns religion...no way in my opinion it won't!

you have to be more precise. Micro-biology is a big field and you must zero on some topics[about microbiology] to enable us to help you. And you can always google your query for answers!

one can always try rsc website because it has got very good articles about any area that related to chemistry;;

http://www.rsc.org

I didn;t have time to read the OP's post but from the replies from other members of the forum, I take it that the OP is trying to say that either him or someone he knows has seen 'God'. God really exists but saying that you saw him and wagering to it won't change anyone mind....in fact no one can see God except only the Prophets and angels.!

I am hearing for the first time that malarial parasite would be sold online. I don't think so because when purshing them one can't actually tell their intentions as to why they want it to the seller in a way that is ok with the sellers. Anyway, if there is a slighest chance why not google it.

Err...perhaps I was not as clear as I could have been.

 

I meant that I had one beaker with both amylase and starch, which might or might not have starch in it still. It did, however, have sugar.

 

Now, I had another beaker with only starch. Sorry if this was not clear. I hope you will agree with me that there is supposed to be starch in a beaker that contains only starch. However, the iodine did not show any starch. There was no blue-black coloring; it remained brown. I am also fairly certain I put enough iodine into the solution. Oh, and I believe the solution's bottle said it was 1% starch.

i am not sure about what you mean. You say that the starch and amylase are in a single beaker then you say that the beaker had only starch. Well, if it did have only starch then i imagine that the solution you are using may be bad ones[its just a guess]. Try to repeat the test and i hope this time things clear up for you;)!

Also, Bromine is placed in a group which changes in physical states from top to bottom.

I finally opened the link, however i won't be doing the survey just yet....but i will do so in a few days. Hope you don't mind!

Electron withdrawing group are one which produce the negative inductive effect while donating group produce the positve effects. Its means the same as what mrsemmapeel has mentioned. OH- and NO3- I think make a good withdrawing groups!

amylase converted starch into maltose which gave you the positive result with benedict solution, however since starch has been broken down iodine test will be negative

Dunno if that would give you all the enzymes though and might not even mention the pentose-phosphate pathways, I would think an undergrad biochemistry text book would be better.

Yeh I think he will be better advised to study undergrad biochemistry book!

no mate no, but because you have already awarded the repo, i am obliged to fill it sooner given that the link opens ofcourse!

only cig smoking for me (about 40 a day), although I do drink a few cans of beer every day, it`s Alcohol free.

YT, you should look after yourself mate, cig smoking is notoriously dangerous as i am sure you are aware.

For me I claim to be the healtiest person in whole of SFN, i don't smoke, drink (alcohol) that is, i do a lot of sports and i eat healthy food. Mutton meat, vegs and fish is what i usually take. I don't take much of fast foods!

I'd rather be exempt from taxes and illness, but okay.

nice one

You know its funnier you mention it. Fasting is only a pillar of islam which is observed so that we could feel the pain of starvation of people who remain unfed because they can't earn much etc. So its a 12hr fast for this purpose. As per who can and can't keep a fast, you would be surprised to know that list is bigger for who don't have to than who must. I understand from your talk that you are an atheist but one who is a friend of mine hmmm.