• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Biology; Chemistry; Physics: Post your doubts here!

Messages
4,162
Reaction score
1,119
Points
173
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 :p
 
Messages
40
Reaction score
10
Points
8
Terrible Question:eek:
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!:(
 
Messages
2,159
Reaction score
3,760
Points
273
Terrible Question:eek:
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)
 
Messages
887
Reaction score
466
Points
73
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 ! ! :D




difficult question :D :(
oh well i forgot to mention the length it is 50cm
 
Messages
40
Reaction score
10
Points
8
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
 
Messages
1,824
Reaction score
949
Points
123
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
 
Messages
2,159
Reaction score
3,760
Points
273
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? o_O could you type the exact mcqs , i think you're interpreting them wrong.
 
Messages
8,392
Reaction score
9,461
Points
573
There should be a quantity or amount of ethanol given too. The question you are trying solve is 'incorrect'.
 
Messages
40
Reaction score
10
Points
8
dont seem to get your question? your asking how many moles are there in a mole? o_O 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.
 
Messages
17
Reaction score
1
Points
13
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 :p
 
Messages
40
Reaction score
10
Points
8
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 :p
no need to memorize just understand!!!!videos at youtube might help you!!!!!
 
Top