CHEMISTRY!

[lychee26]

Hey i need may june 02 marking scheme. i can't find it ..
Also november'10 (paper 12) was so HARD.

 

[libra94]

here's the link: http://www.xtremepapers.me/CIE/Internat ... s02_er.pdf
it was in the examiner's report

 

[lychee26]

thank you
How's your preparation ?

 

[utsav156]

http://www.xtremepapers.me/CIE/Internat ... s02_er.pdf
here you go!!

 

[utsav156]

http://www.xtremepapers.me/CIE/Internat ... s02_er.pdf
here you go!!

 

[lychee26]

thanks. Can you please tell me how to do question 2 of may/june 02 ?

 

[CommonSense]

Find the Mr of the empirical formula ie 30
Divide the number of kg of the carbohydrate by the Mr to get the number of moles of the carbohydrate
As the mole ratio of the carbohydrate to carbon dioxide is 1 : 1, multiply the number of moles by the Mr of CO2 to get the mass in kg
1.8/30 = 0.06
0.06 * 44 = 2.64 kg

 

[lychee26]

thank you !

 

[sweetiepie]

thanks ...