Biology; Chemistry; Physics: Post your doubts here!

[scouserlfc]

@ ALL: Marking Schemes were made before 2004 and infact even in the 90's. Yet CIE didn't find appropriate to publish them then. If you want them, just buy them from the CIE. (Isn't that costly either)

okay thats informative !

 

[SalmanPakRocks]

Click here

 

[scouserlfc]

yeah i know abt this one of my friends he ordered the marking schemes like some years ago so i have a few of them i think

 

[Birdie Honey]

Terrible Question
what is the difference "molecule" and "moles".please help me solve mcq#9 and 10 of june 1996.and mcq#10 of nov 1995 !!!!!!!!!!!!!!help needed urgently!

 

[multixamza01]

Terrible Question
what is the difference "molecule" and "moles".please help me solve mcq#9 and 10 of june 1996.and mcq#10 of nov 1995 !!!!!!!!!!!!!!help needed urgently!

a molecule is a combination of two or more atoms. Like O2 , SO2 , CO2 ,H2 , Cl2 , Br2 etc

a mole is the name given as a whole to 6 x 10^23 particles ( molecules can be used in this context)

 

[snowbrood]

yeah it is mentioned but here we are talking abt if it just says aqueous solution then selective discharge occurs of anions like in concentrated media ! !




difficult question

oh well i forgot to mention the length it is 50cm

 

[Birdie Honey]

a molecule is a combination of two or more atoms. Like O2 , SO2 , CO2 ,H2 , Cl2 , Br2 etc

a mole is the name given as a whole to 6 x 10^23 particles ( molecules can be used in this context)

so,how many moles are there in one mole of ethanol and ehtane????
and,one mole of ethane and ethanol will have same volume at room temprature????fast please

 

[Birdie Honey]

a molecule is a combination of two or more atoms. Like O2 , SO2 , CO2 ,H2 , Cl2 , Br2 etc

a mole is the name given as a whole to 6 x 10^23 particles ( molecules can be used in this context)

answer please!!!

 

[syed1995]

so,how many moles are there in one mole of ethanol and ehtane????
and,one mole of ethane and ethanol will have same volume at room temprature????fast please

one mole.

and as far as volume goes i think one mole of ethane will have more volume as its a gas and will occupy 24dm3 while ethanol is a liquid .. but not sure

 

[multixamza01]

so,how many moles are there in one mole of ethanol and ehtane????
and,one mole of ethane and ethanol will have same volume at room temprature????fast please

dont seem to get your question? your asking how many moles are there in a mole? could you type the exact mcqs , i think you're interpreting them wrong.

 

[SalmanPakRocks]

There should be a quantity or amount of ethanol given too. The question you are trying solve is 'incorrect'.

 

[Birdie Honey]

dont seem to get your question? your asking how many moles are there in a mole? could you type the exact mcqs , i think you're interpreting them wrong.

i am sorry that was how many molecules are there....and look above i have mentioned exact mcq no.

 

[Birdie Honey]

There should be a quantity or amount of ethanol given too. The question you are trying solve is 'incorrect'.

both are 1 mole!

 

[multixamza01]

i am sorry that was how many molecules are there....and look above i have mentioned exact mcq no.

i'm sorry but i dont have access to papers before 1999. Maybe someone else can help

 

[xcherriesx]

hey how many of you severly DISLIKE the last few chapters of physics?

 

[Birdie Honey]

i'm sorry but i dont have access to papers before 1999. Maybe someone else can help

fine!!no problem.but i would advice you to do a little more, that would help your understanding level!

 

[Birdie Honey]

hey how many of you severly DISLIKE the last few chapters of physics?

They are pretty easy!i dont hate them!

 

[xcherriesx]

well thats good if you've gotta grip over them... i really hate them, but after proper reading, understanding and a little bit of rta maybe i wont hate them so much

 

[Birdie Honey]

well thats good if you've gotta grip over them... i really hate them, but after proper reading, understanding and a little bit of rta maybe i wont hate them so much

no need to memorize just understand!!!!videos at youtube might help you!!!!!

 

[snowbrood]

Click here

the form does not have any option to buy 90s marking scheme just marking schemes from 2007 onwards??