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yeah actully wat i know is dat the formula for PROTEN is just NH2JmCullen said:next.. sorry.. im not good in chemistry..
what is the structure of protein?
is it NH2-CRH-C=O-OH ????
haochen said:isotope:
same element which hv the same number of proton (atomic number) and different atomic mass.
eg. U-238 and U-235
isomers:
An element which hv the same molecular formula but different structure formulas
eg.But-1-ene and But-2-ene
hope u understood
JmCullen said:haochen said:isotope:
same element which hv the same number of proton (atomic number) and different atomic mass.
eg. U-238 and U-235
isomers:
An element which hv the same molecular formula but different structure formulas
eg.But-1-ene and But-2-ene
hope u understood
oh i see.
Thanks a lot!
how about this..
differences in volatility, solubility and electrical conductivity between ionic and covalent compounds
what i know, ionic is soluble and it is good conductor of electricity when molten right?
haochen said:JmCullen said:haochen said:isotope:
same element which hv the same number of proton (atomic number) and different atomic mass.
eg. U-238 and U-235
isomers:
An element which hv the same molecular formula but different structure formulas
eg.But-1-ene and But-2-ene
hope u understood
oh i see.
Thanks a lot!
how about this..
differences in volatility, solubility and electrical conductivity between ionic and covalent compounds
what i know, ionic is soluble and it is good conductor of electricity when molten right?
yeah but u need to know ionic is soluble in water and covalent is soluble in organic liquid
covalent dont conduct electricity
haochen said:covalent dont conduct electricity
ionic is non-volitile
covalent is volatile
hope it helped
JmCullen said:haochen said:covalent dont conduct electricity
ionic is non-volitile
covalent is volatile
hope it helped
thanks!!!
oh..
btw, what is the name of "same number of protons but different number of neutrons"?
is it isotope?
xIshtar said:JmCullen said:haochen said:covalent dont conduct electricity
ionic is non-volitile
covalent is volatile
hope it helped
thanks!!!
oh..
btw, what is the name of "same number of protons but different number of neutrons"?
is it isotope?
Yep, an isotope is exactly that..
As for the earlier question about proteins..
The basic units, amino acids, utilise the amine linkage, NH2..
The proteins consist of a carboxylic acid and an amine.. So, it utilises the C=ONH bonding..
Hope I helped..
xIshtar said:No probs. xD. I've been doing M'choice papers all morning, done 6 so far xP..
JmCullen said:xIshtar said:No probs. xD. I've been doing M'choice papers all morning, done 6 so far xP..
oh!! no wonder! haha..
oh.. can u explain the difference between concentrated hydrochloric acid and concentrated aqueous sodium chloride and dilute aqueous sodium chloride, dilute sodium chloride when they undergo electrolysis?
i mean, the product. im confuse with concentrated, concentrated aqueous, dilute, dilute aqueous.
MohammedNoor said:Metal X is low in the reactivity series and it is liberated by electrolysis of its bromide.
Metal X is ……1…… and the bromide is ……2…… .
Which words correctly complete gaps 1 and 2?
1 2
A lead in solution
B lead molten
C sodium in solution
D sodium molten
i didnt understand this ............plz explain me this question
MohammedNoor said:Metal X is low in the reactivity series and it is liberated by electrolysis of its bromide.
Metal X is ……1…… and the bromide is ……2…… .
Which words correctly complete gaps 1 and 2?
1 2
A lead in solution
B lead molten
C sodium in solution
D sodium molten
i didnt understand this ............plz explain me this question
xIshtar said:JmCullen said:xIshtar said:No probs. xD. I've been doing M'choice papers all morning, done 6 so far xP..
oh!! no wonder! haha..
oh.. can u explain the difference between concentrated hydrochloric acid and concentrated aqueous sodium chloride and dilute aqueous sodium chloride, dilute sodium chloride when they undergo electrolysis?
i mean, the product. im confuse with concentrated, concentrated aqueous, dilute, dilute aqueous.
Basically. You need to learn the discharge series, and the ions in a solution in order to answer these questions.
Whenever there is an aqeous solution, there are also OH ions, meaning hydrogen or Oxygen can be formed..
So, for HCl -> At the cathode = Hydrogen, At the anode = Chlorine -> Electrolyte = Used up I believe..
Aqeous Sodium Chloride (Brine) -> At the cathode = Hydrogen, At the anode = Chlorine -> Electrolyte = NaOH forms.
Just make sure you note the ions, and learn the discharge series well..
MohammedNoor said:Metal X is low in the reactivity series and it is liberated by electrolysis of its bromide.
Metal X is ……1…… and the bromide is ……2…… .
Which words correctly complete gaps 1 and 2?
1 2
A lead in solution
B lead molten
C sodium in solution
D sodium molten
i didnt understand this ............plz explain me this question
Low in the reactivity series, immediately eliminates C and D. So, think about the discharge series.. I think B is the answer
xIshtar said:Basically. You need to learn the discharge series, and the ions in a solution in order to answer these questions.
Whenever there is an aqeous solution, there are also OH ions, meaning hydrogen or Oxygen can be formed..
So, for HCl -> At the cathode = Hydrogen, At the anode = Chlorine -> Electrolyte = Used up I believe..
Aqeous Sodium Chloride (Brine) -> At the cathode = Hydrogen, At the anode = Chlorine -> Electrolyte = NaOH forms.
Just make sure you note the ions, and learn the discharge series well..
MohammedNoor said:Yah its the right answer ............can u upload the discharge series......plz .........by the way thnx
Discharge series means reactivity series or whatttttttttttttt..............................xIshtar said:MohammedNoor said:Yah its the right answer ............can u upload the discharge series......plz .........by the way thnx
The discharge series should be in your chemistry book..
Just remember that more reactive metals are lower..
H is above them in the series..
SO4 is lower than OH..
Best advice I can give
Just look in your book at the electrolysis chapter.
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