Physics, Chemistry and Biology: Post your doubts here!

[shingiechingz@8]

what min mark do you think is gonna be an A in the paper 31 threshold? i think that its gonna be btwn 40-55

 

[Ahmed Elsiddig]

how many marls did this question cost

Ethylamine was 45 and HBr had 81..............

 

[masterex567]

3

how many marls did this question cost

 

[Ahmed Elsiddig]

I did the reverse...i said A cuz HbR has more mass and it diffuses less...wont i get marks for the idea cuz i just miscalculated the masses

 

[sj0007]

Yup so its formed at C!

Yes!!!

 

[Saad the Paki]

U are correct

Mark scheme is drunk
wtf?!

 

[Ahmed Elsiddig]

will i or wont i get a mark

 

[sj0007]

Mark scheme is drunk
wtf?!View attachment 53885

Yessss...... It totally is!!!!
I bet they made a mistake !!!

 

[shingiechingz@8]

what if the grade threshold was like this. Wouldn t that be awesome?

 

[sj0007]

what if the grade threshold was like this. Wouldn t that be awesome?

OMG!!!
That would be awesome!!!!
A* would be confirm!!

 

[sj0007]

will i or wont i get a mark

If u said that HBr has more mass and it diffuses less then it means that only ur position is wrong so probably u would lose a mark......

 

[Ahmed Elsiddig]

Yessss...... It totally is!!!!
I bet they made a mistake !!!

please answer my question

 

[Ahmed Elsiddig]

sorry didnt see ur response

 

[sj0007]

please answer my question

Which ques?

 

[sj0007]

sorry didnt see ur response

No probs!!

 

[Ahmed Elsiddig]

If u said that HBr has more mass and it diffuses less then it means that only ur position is wrong so probably u would lose a mark......

but not all 3 isnt it?

 

[sj0007]

but not all 3 isnt it?

No I don't think so...... Atleast u will get one mark!

 

[shingiechingz@8]

Guys how can person calculate his/her grade using the grade thresholds?

 

[Mr.Physics]

Guys how can person calculate his/her grade using the grade thresholds?

Ok for example in may june 2014 the grade threshold for an A* was 139/200. However the total marks for chemistry are 180 as p1=40,p3=80,p6=60

so make an equation ,

n/180=139/200
n=(139/200) x 180
n=126

So the marks required for an A* will be 126/180 . (Not sure about this method)

 

[shingiechingz@8]

Ok for example in may june 2014 the grade threshold for an A* was 139/200. However the total marks for chemistry are 180 as p1=40,p3=80,p6=60

so make an equation ,

n/180=139/200
n=(139/200) x 180
n=126

So the marks required for an A* will be 126/180 . (Not sure about this method)

so if l have 122/180 what would l have for instance.........................