CHEM AND BIO HELP AND TIPS HERE

[ambitious94]

Heyy Ivo thanks for ur help man!
Just something i wanna add to that...they add peat (manure) to make the soil acidic, as well as acid! XD

[CatAly$t]

OK, Q24, we know that it is a sensory neurone so it must be D.  We know it's the sensory neurone because it has a long dendron and short axon.  Dendron bring information to the cell body, and axon bring information away from the cell body.  Also, the cell body is located outside the spinal cord, so we know it is a sensory neurone.

Q28, I think it's C, because it's developing because there is a vacuole.  Also, it is growing because cell number is increasing.

Q38, B, think of the log phase, exponential, because there are no limiting factors, so everything is in abundance (e.g. unlimited space, food etc)

Did I get them right?

yup...u got them right again...thx for the explanation bro...

[guMnam]

Thanks

[jellybeans]

HELP PLEASE!
bii) & d) !
thaaaanks.

[holtadit]

Another isomer would be :

CH₃-CH=CH-CH₃       Name= But-2-ene


For part (d)

monomer is propene   CH₃-CH=CH₂

[jellybeans]

Another isomer would be :

CH₃-CH=CH-CH₃       Name= But-2-ene

... explanation ?

[holtadit]

... explanation ?

Okay first look at the alkene. How many carbons are there ? 4, right ? So that means it is butene OR Butane.

BUT it has a carbon double bond so it must be an ALKENE hence it is BUTENE !!

Now the isomer of butene can be but-2-ene.  The  numeral 2 signifies that the carbon double bond is located on the SECOND CARBON.

So thats how you do it

[jellybeans]

Okay first look at the alkene. How many carbons are there ? 4, right ? So that means it is butene OR Butane.

BUT it has a carbon double bond so it must be an ALKENE hence it is BUTENE !!

Now the isomer of butene can be but-2-ene.  The  numeral 2 signifies that the carbon double bond is located on the SECOND CARBON.

So thats how you do it

thank you. how do you draw dii) ?
By the way... 'The  numeral 2 signifies that the carbon double bond is located on the SECOND CARBON' ? um.. from the right? O.o

[holtadit]

thank you. how do you draw dii) ?
By the way... 'The  numeral 2 signifies that the carbon double bond is located on the SECOND CARBON' ? um.. from the right? O.o

https://studentforums.biz/index.php/topic,8531.15.html      Read to learn how to name. He is referring to an alkane on the 1st page.


dii) BELOW

[jellybeans]

https://studentforums.biz/index.php/topic,8531.15.html      Read to learn how to name. He is referring to an alkane on the 1st page.


dii) BELOW

thanks. how do we join 3 of those together? like.. 3 units together? :/

[holtadit]

thanks. how do we join 3 of those together? like.. 3 units together? :/

I dont understand. 

[holtadit]

He meant how to join three units of monomers?

and By the way+rep.

Thanks

Oh, okay. Just remove the brackets and repeat my drawing 3 time making sure the bonds on the side connect to each consecutive unit.

[jellybeans]

Thanks

Oh, okay. Just remove the brackets and repeat my drawing 3 time making sure the bonds on the side connect to each consecutive unit.

hahah lol okay thanks

[holtadit]

hahah lol okay thanks

Any time ! 

[IGCSE AWESOME STUDENT]

i really dont understand anything in moles......can some1 gimme a site where they explain how to calculate moles easily? thanks.