CHEM AND BIO HELP AND TIPS HERE

[Vin]

the other..

[Vin]

here..

[MasterMath]

here..

The structural formula of anything is the one showing the bonds and the display is like CH₃-CH bla bla
??

[elemis]

The structural formula of anything is the one showing the bonds and the display is like CH₃-CH bla bla
??

You are not making sense; please be more precise.

[MasterMath]

And By the way The polymer formed by HO-CH2CH2-OH and
HOOC-C6H4-COOH shouldnt it be OC-C6H4-COO-CH2CH2-O ?
The alcohol looses H and the acid looses - OH
The MS says :
-OOC-C6H4-COOCH2CH2O- =_="
Where did the first extra O come from >_> or its just a part of the last monomer?

[MasterMath]

You are not making sense; please be more precise.

When they ask for Structural formula ...Which one do you draw/write .. The one with ALL THE BONDS or in this form CH3-CH2-CH2..etc
This is what i mean by all bonds
    H  H
H-C -C-H or do we write it in this form CH3-CH3 or its the same 
   H   H

[CatAly$t]

i) 8/64=0.125

ii) 14.2/71=0.2

iii) SO2 (The one which isn't in excess is the one with the least no. of moles)

iv) 0.125 (We use moles of limiting reagent)

v) 0.125*135=16.9g

thx...

so the one with most moles means it's excess??always?

and the fourth one i still dont get it....

[elemis]

When they ask for Structural formula ...Which one do you draw/write .. The one with ALL THE BONDS or in this form CH3-CH2-CH2..etc
This is what i mean by all bonds
    H  H
H-C -C-H or do we write it in this form CH3-CH3 or its the same 
   H   H

Actually, I am not sure When they you give a big space I draw the displayed formula AND write the condensed one (CH3-CH3)

[MasterMath]

Actually, I am not sure When they you give a big space I draw the displayed formula AND write the condensed one (CH3-CH3)

mmkkay and can you look at my other question about the polymer , thanks!

[blackberry]

Got a doubt from the 2005 m/j paper 3 chemistry paper.
When 0.015 moles of iodine react with 0.045 moles of chlorine to form 0.030 moles of a single product. So, we have to complete the equation. The answer is:
I2 + 3Cl2 = 2ICl3                my question is how come theres 3 atms of Cl formed?

Oh and second question....when iodine reacts with zinc nd wen u decrease the concentration of iodine how come less of zinc is used up?

[Helium]

yet another..

Thanks dude..

so i can just draw it like                   
                      o
                       l
                   o-Ge-o
                       l
                       o

[rhea]

QUESTIIIOON!!

balance the ionic equation By the way scandium fluoride and calcium:-

...Ca+...Sc³⁺  -->  ...Ca²⁺ +...Sc

[WARRIOR]

QUESTIIIOON!!

balance the ionic equation By the way scandium fluoride and calcium:-

...Ca+...Sc³⁺  -->  ...Ca²⁺ +...Sc

3..Ca+.2..Sc3+  -->  3...Ca2+ +.2..Sc


there has to be same maount of electrons on each side , therefore we make it 6 -->6

[Raywin]

Guys, a silly doubt Whats the difference between Heat, Roast and burn in air.. Thanks.

[MasterMath]

3..Ca+.2..Sc3+  -->  3...Ca2+ +.2..Sc


there has to be same maount of electrons on each side , therefore we make it 6 -->6

The polymer formed by HO-CH2CH2-OH and
HOOC-C6H4-COOH shouldnt it be OC-C6H4-COO-CH2CH2-O ?
The alcohol looses H and the acid looses - OH
The MS says :
-OOC-C6H4-COOCH2CH2O- =_="
Where did the first extra O come from >_> or its just a part of the last monomer?