Isn't the molecular formula for Propene in question 3.3, 'C2H6' (i.e. General Formula for Alkenes: CnH2n)? It has been written instead as C3H8, so the equation balancing may actually be incorrect?
Hi, what would you approximate to be the grade boundaries for this paper? Or relative to your class' results on this test, what did you set the minimum mark for an A? Thanks in advance :)
Idk if you see the comments anymore, but just wanted to check: when asked to draw the structure of a molecule, do you have to draw out every bond like a displayed formula?
for question 2.2 my gradient ended up being 2 x 10^-6 so when i divided the rates by each other I got 2.285 and then rounded it up to 2.23 and when I did 1.5^2 I got 2.25. I then rounded them both to 2s.f. and went on to say something like 'when conc. increases by 1.5times rate increases by a factor of 2.3 to 2s.f. 1.5 squared is 2.3 to 2s.f. so the order is 2' would I still get the marks in an exam?
idk if i’m being rlly stupid but question 8.1 (48:47) why is it 2-deoxyribose?, is it because of where it’s attached?, can you just put deoxyribose? cause i do biology as well so i would’ve just put that😅😅
It's given in the data sheet and since all you have to do is copy it, they want you to copy it exactly 😅 you know how exacting chemistry is when it comes to names lol
[Timestamps]
Q1 = 1:22
Q2 = 14:24
Q3 = 19:46
Q4 = 31:38
Q5 = 38:00
Q6 = 40:36
Q7 = 45:10
Q8 = 48:13
Q9 = 54:14
Q10 = 1:05:55
Q11 = 1:11:27
Q12 = 1:16:57
respect g gotta pay homage to ur work rate
Got that work rate like Kante😂
This paper is like 70% physical, 30% organic .......me likey
"Positional" isomerism is no longer accepted by AQA - you must write "position"
Thx for that
At 22:17, isn't propene C3H6?
Lisa Turley it certainly is. Well spotted!
Love your vids! Would you be able to do a video on the required practicals in the AS exams? :)
that feeling when after watching one video you understand more than after two years of school...........
then instantly forget about the stuff after a few hours
who would dislike this?
set 8s who looked for ammonia on the periodic table
@@j.p.6716 🤣🤣🤣
36:20 mood when you see a 8 marker on NMR 1:06:16
lool fr
Hey, do you have any notes/tutorials on the practical techniques? Think I'm really struggling to answer the practical questions :'(
Isn't the molecular formula for Propene in question 3.3, 'C2H6' (i.e. General Formula for Alkenes: CnH2n)? It has been written instead as C3H8, so the equation balancing may actually be incorrect?
Love this dudes humour
Hi, what would you approximate to be the grade boundaries for this paper? Or relative to your class' results on this test, what did you set the minimum mark for an A? Thanks in advance :)
99/105 for a B
Idk if you see the comments anymore, but just wanted to check: when asked to draw the structure of a molecule, do you have to draw out every bond like a displayed formula?
ye
At 12:24 (Question 1.5), shouldn't the unit of the rate constant given in the question have s^-1 at the end?
no. it gives the units in the question
Slap some Respek on your name! Nice vid
for question 2.2 my gradient ended up being 2 x 10^-6 so when i divided the rates by each other I got 2.285 and then rounded it up to 2.23 and when I did 1.5^2 I got 2.25. I then rounded them both to 2s.f. and went on to say something like 'when conc. increases by 1.5times rate increases by a factor of 2.3 to 2s.f. 1.5 squared is 2.3 to 2s.f. so the order is 2' would I still get the marks in an exam?
id give you the marks. an examiner might not
in 3.8 how do you get the molar values?
percentage divided by Mr
I have a question about Q8. Wouldn't the LP on oxygen in guanine hydrogen bond with the hydrogens on cytosine as oppose to the LP on the Nitrogen?
Nvm I was inpatient. You corrected it like a minute later. Apologies.
Hello sir, have you got a video on DNA/Enzymes?
Arjan Atwal He only does AQA Chemistry videos, not Biology
Bazi Reloaded Erm there is a DNA, Protein and enzyme topic in AQA Chemistry
Arjan Atwal Are you talking about GCSE, or A2? I'm only here for AS at the moment
Bazi Reloaded A2, you shall find out next year 👍🏽
For question 6 part 1, how did you know these were the asymmetric carbon atoms? Thanks in advance.
i know this is 4y old but it’s because of the central carbon being a chiral centre i think
chiral carbons are unsymmetrical. achiral carbons are symmetrical
idk if i’m being rlly stupid but question 8.1 (48:47) why is it 2-deoxyribose?, is it because of where it’s attached?, can you just put deoxyribose? cause i do biology as well so i would’ve just put that😅😅
It's given in the data sheet and since all you have to do is copy it, they want you to copy it exactly 😅 you know how exacting chemistry is when it comes to names lol
in question 4.1 why isnt the answer 1,1,4 trimethylbutan-2-ol instead?
alcohol is your priority group so it should have smallest number.
For question 9.7 i dont understand why it is a hydrolysis reaction? :/
Did you receive an answer for this question?
@@hafsamir5206 hydrolysis because N-H is attached to C=0 which forms an amide link. hydrolysis reaction required to break amide link/peptide bond
Qu 4.8 - why can't it be dehydrated to form an alkene?
no hydrogen on adjacent carbon. theres 3 methyls
30:30 Anyone, why timsing by 4?
To get the empirical formula which has to be a ratio of whole numbers.
@@mattirmiger8291 thanks. but could it not be multiplied by 2 or 3 or 5 or 8?
@@BiSim90 Nah the point of x4 is to get the 1.25 not having any decimals, could do by 8 but sometimes they want empirical which is simplest form.
question 3.8 why do you multiply by 4?
3 years too late but it was to give a whole number for the hydrogen. 1.25 x 4 = 5
anyone else found that nmr spec question hard?
Do Cambridge papers pls
this paper is so hard
I KNOW
Could u pliz make a video on paper 5 Alevel