Discussion in 'Cambridge O Levels' started by scouserlfc, Sep 13, 2011.
glad to help.
wheresthe specimen for chemistry
you lucky guy!
yes this should work pretty fine looking at what the question asks...but i would recommend not taking a chance on your three year hardwork and writing like this
plants (producers) ----> Cow ( primary consumer) ---------> Lion ( secondary consumer) ----------> Bacteria (decomposers)
explain why observed ratios often differ from expected ratios, especially when there are small numbers
of progeny; plz any1 answer diz properly
let me share what i know...
if your talking about yeild??
where did u confirm?
exactly what should be studied for ATP in the night before the exam??
how many of the electrons in a molecule of ethane, C2H6 are not involved in bonding?? how ???
decane ------> ethane ------> poly(ethene) " how molecular size changes during this process ??? "
it' better to practice past papers beforehand , and do a quick go through of the entire thing once .
Make a dot - cross diagram. Check .
Something like this :
3H - C - C -H3 => 3H : C : C : H3 ( 3H : C - means 3 single covalent bonds between C-H)
=>No electrons are not involved in sharing .
Decreases ( decane ----> ethane )
Decreases (ethane -----> ethene )
Increases [ ethene -----> poly(ethene)]
well i recommend you go through the experiments in the book and the basic things used in the experiments, even the basics, i guess that will help you out...and yes obviously...do some prayer for yourself for a good paper...
practice past papers!..
(i) describe the use of an astable circuit
(ii) describe how the frequencey of an astable circuit is related to the values of the resistive and capacitative components
state the meaning of the terms processor , output device and feedback
help me in chemistry n2004 p2 a1 part c !
Decreases, Descreases, Increases
Separate names with a comma.