http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s11_qp_22.pdf
Can anyone please explain Q1 especially Q1 (c) i).
Can anyone please explain Q1 especially Q1 (c) i).
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)
Sorry but there is no such question in the pastpapers and this is the entire question which i have.Could you please link me to the paper, or a screenshot of the exact entire question please.
Thank u(b)(ii)
one mol of diesel requires 23 mol of O2. one mol of H2O2 produce 1/2 moles of O2. so it 2*23 = 46 mol of H2O2 will be required
(c)
Mr = (15*12)+32=212
mass = 212 tonnes = 212X10^6 grams
n(diesel)=mass/mr=212X10^6 grams /212=1X10^6 mol
n(H2O2)=(46)*n(diesel)=46* 1X10^6=46X10^6 moles
Mr of H2O2=2+16+16=34
Mass of H2O2 = n(H2O2)*34=46X10^6*32=1564X10^6 grams = 1564 tonnes
what do we call nucleiphiles and electrophiles .. atoms or molecules or compounds or elements or substances
In definition what am I supposed to say !i think they can be both ions and atoms as nucleophiles are species that can be anions or any electron defiecient atom
while electrophile can be cation :/
The definition given in the book isIn definition what am I supposed to say !
Sorry but there is no such question in the pastpapers and this is the entire question which i have.
http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_s11_qp_22.pdf
Can anyone please explain Q1 especially Q1 (c) i).
Species is the correct wordwhat do we call nucleiphiles and electrophiles .. atoms or molecules or compounds or elements or substances
How to draw this :
PS : As students take care , this might be the question for you this session !!!
View attachment 41393
How to draw this :
PS : As students take care , this might be the question for you this session !!!
View attachment 41393
Can anyone please give me marking scheme explanations for what are electrophiles, nucleophiles and free radicals?
Electrophile : a particle with a positive charge to gain electronsIn definition what am I supposed to say !
What about nmr spectroscopy in A2? Like, should I be memorising the Peaks at certain chmical shifts?
In first one Heat is given out so temp of surrounding Increased so Exothermic ie Negativehttp://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Chemistry (9701)/9701_w11_qp_22.pdf
What is the difference in Question 3(b) iii and Q3 (c) iii why is the answer of the enthalpy change here is positive and here is negative !! can someone help me Please!!!
For almost 10 years, the site XtremePapers has been trying very hard to serve its users.
However, we are now struggling to cover its operational costs due to unforeseen circumstances. If we helped you in any way, kindly contribute and be the part of this effort. No act of kindness, no matter how small, is ever wasted.
Click here to Donate Now