CHEM AND BIO HELP AND TIPS HERE

[nid404]

to come back to the chemistry topic

how is

2H + O ---->   H₂O

it should be either     2H+O
or it should be
                             2HO

haha
silly doubt

Is this a serious doubt

Anyway there's only one atom of O, so it can'd be 2HO...:S
I still can't believe this is coming from u vaibhav

[SGVaibhav]

lol u took my doubt seriously


i got A+ in chemistry (RESPECT RESPECT )
i know it [i forgot chem not but  ]


my question is that which is the RAREST halogen on earth ??

EDIT 1:--..aww crap, i was writing this, but nid posted before i posted this .

EDIT 2 -- ... aww crap again, some weird thing going on, telling im trying to post something while my ip already posted something 5 seconds ago (that was not right )  and after that some double post submitted ... something something while it was not posted..
lets not think about that

coming back to nid

it can be

2H   +   O₂  --------------->   H₂O
but this is wrong becasue there are 2 O's
so it shuld be

4H   +   O₂  --------------->   2H₂O

i think im right,

[SGVaibhav]

how is

2H + O ---->   H₂O

it should be either     2H+O
or it should be
                             2HO

haha
silly doubt

ok i asked a wrong question
while asking i was not thinking CHEMESTRICALLY at all, and after getting replies i started thinking according to chemistry(thinking of chemistry after months  )

[holtadit]

Could some one tell me if my answers are correct to the following question.

Thanks !

PS: its in the attached doc file !

[nid404]

Typing in arguments is not what I do, in-fact it bores me. I mean not to be arrogant and not to be rude. I have always tried to help people, many people have taken my examples and still thank me for the things that I do. Aadi being just one of them.

Now, back to business. I understand that both you me and Aadi are mods. I would kindly and sincerely like you Nid404, to understand that we do not need to be taught how to handle people! Furthermore, you do not have the right to give me a warning under any circumstances, that is the sole authority of an administrator, if you would like to consult with them, please do so or simply 'get a life'. To begin with, Aadi explained it perfectly fine, perfectly, it was the best explanation that he would get! I doubt that anyone will provide such a dedicated answer. But people totally miss the point of this, it was a joke and to some extent a motivating factor! That was its purpose!

Again I will stress, you are no more superior to me or to Aadi! Wielding an axe does not mean that other weapons are inferior, and other skills are inferior. Try to understand that the 'greatness' with which you handle your job is no more than simple oversensitiveness. Kindly refrain from making commands, I am not obligated to execute yours, and neither is Aadi.

Dude look at your tone....
I never said im superior in any which way...And mods have the right to issue a warning if u don't knw.....pls read the rules.
By the way aadi is a frnd....no statement I make here is "personal".
Whatever your views are can be expressed in a better way...there is no point rediculing...cuz ur only openly showcasing everythin that u say ur not(rude, arrogant,etc..)

@aadi-evrythn 1 says to correct u is considered to be meaningless and generalized

{edit}- Please make statments for urself...aadi will talk to me if he has a problem...u don't need to say anything on behalf of him

[nid404]

Could some one tell me if my answers are correct to the following question.

Thanks !

PS: its in the attached doc file !

The mass of BaCO3 is incorrect
Ba=137
C=12
O=16X3
=197g

moles of BaCO3 that reacted would be 0.005(1:1 ratio)
Mass of BaCO3(pure) would be 0.005X197=0.985g
%purity=0.985/1.23 X100
=80.08%

[holtadit]

Thanks again Nid !!!

I messed up on calculating the mass of BaCO3 . I thought C was 12 and O was 16

Silly mistake ! Anyways thanks for helping !

+rep

[holtadit]

QUESTION
Draw diagram 1 to show the arrangement of silicon atoms around one carbon
atom in silicon carbide. Label this diagram 1.

Draw diagram 2 to show the arrangement of carbon atoms around one silicon
atom in silicon carbide. Label this diagram 2.

ANSWER
diagram 1 four silicons around one carbon
diagram 2 four carbons around one silicon

-------------------------------------------------------------------------------------

I dont understand how this is so... the formula of Silicon Carbide is SiC with the ratio of Si:C being 4:4 hence 1:1.

How do u get the answer.... PLZ explain the UNDERLYING chemistry behind this question. What is is that u need to know to do these questions.

[nid404]

Silicon nd Carbon are both group 6 elements...valency four.
This should help u analyse the diagram.....to form an octet...they will share 4 electrons
if u still don't get it....ill explain it

[saleemsamer]

hey guys i have searched for what i wanted on this site but haven't found wat i need
i need notes for genetic engineering, population size and human influence on the ecosystem.
they are self study topics and i want to make sure that i understand.
plz post any type of notes with these topics and thx in advance

[Saladin]

No problem, I need to search for them. But this is a very good website to  keep you busy:

http://www.s-cool.co.uk/gcse/biology/genes-and-genetics.html

[saleemsamer]

THX

[holtadit]

Thanks Nid for the help. Here's another question....


We all know how to draw the internal structure of an alloy. But one MS said we MUST show the presence of delocalized electrons.

How do is show this on the below diagram in a neat way ?


PS: forgive sruffy drawing

[SGVaibhav]

let me try, give me 1 min...

[SGVaibhav]

i seriosuly forgot...
but it could be like this


the minus sign represents sea of electrons

lol i really forgot