Any Type of Doubts in ENg Phy Chem Bio or Math....Ask me here!!!

[Prathmesh Thakkar]

i understand yaar! i was just kiddin....!

So was I.....lets lol..... Hahahahahahahahahahahahahah

 

[darklashbazinga]

everything!!

could u be a lttle more specific plzzzzzzzzzzzzzzzzzz
specially n these topics i am very weak
could u plzz list down imp points plzzzz

 

[somya]

So was I.....lets lol..... Hahahahahahahahahahahahahah

lollz...
nice one!!

 

[Prathmesh Thakkar]

lollz...
nice one!!

ty ty...B-)

 

[somya]

could u be a lttle more specific plzzzzzzzzzzzzzzzzzz
specially n these topics i am very weak
could u plzz list down imp points plzzzz

just gimme a few minutes! i'm on it!!

 

[xoxoxogaurav123]

learn about alpha beta and gamma, and fission and fusion dats all

 

[Prathmesh Thakkar]

learn about alpha beta and gamma, and fission and fusion dats all

beta +ve and -ve decay

 

[xoxoxogaurav123]

ya d equations

 

[somya]

could u be a lttle more specific plzzzzzzzzzzzzzzzzzz
specially n these topics i am very weak
could u plzz list down imp points plzzzz

make sure that yuh know the uses of radioactivity, particle tracks, the cro thing and all that gaurav123 said!

learn about alpha beta and gamma, and fission and fusion dats all

i'm afraid that it isn't all!

 

[Prathmesh Thakkar]

make sure that yuh know the uses of radioactivity, particle tracks, the cro thing and all that gaurav123 said!

i'm afraid that it isn't all!

Smart revolt.

 

[xoxoxogaurav123]

can u help in mj 11 paper 32 ques no 8 (c)

 

[Prathmesh Thakkar]

can u help in mj 11 paper 32 ques no 8 (c)

ofc gimme d link

 

[somya]

Smart revolt.

 

[xoxoxogaurav123]

http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Physics (0625)/0625_s11_qp_32.pdf

 

[geminisign]

The induced current i e AC increases when the motor rotates faster.....The motor extracts power from the battery for the motion....the motion causes an induced current which does not flow as the circuit for it is incomplete so it gets wasted......Hope it helped you again

Wonderful thanks.

Now moving on to chemistry, I hope you don't mind me asking you all these questions but you are very helpful.

First variant paper, question 9ci.
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s09_qp_3.pdf

This is the answer:
silicon is limiting reagent
0.07 moles of Si and 25/160 = 0.156 moles of Br2
because 0.14 (2 × 0.07) < 0.156
If 80 used to find moles of Br2 the mark 1 and 3 still available arguments based on masses can be used

Can you please explain "because 0.14 (2 × 0.07) < 0.156 "

 

[Tanvi Shah]

Wonderful thanks.

Now moving on to chemistry, I hope you don't mind me asking you all these questions but you are very helpful.

First variant paper, question 9ci.
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s09_qp_3.pdf

This is the answer:
silicon is limiting reagent
0.07 moles of Si and 25/160 = 0.156 moles of Br2
because 0.14 (2 × 0.07) < 0.156
If 80 used to find moles of Br2 the mark 1 and 3 still available arguments based on masses can be used

Can you please explain "because 0.14 (2 × 0.07) < 0.156 "

Though you need only the last part... I'm explaining it from the top
0.07 moles of Si reacts with 0.156 moles of Bromine
The mole ratio of Si to Br2 is 1:2 (from the equation)
Ideally, o.14 moles of Bromine should react with Silicon but 0.156 is reacting instead. This says that Bromine is in excess and hence silicon is the limiting reagent.
Hope my answer it clear enough...

 

[Fatima18]

Though you need only the last part... I'm explaining it from the top
0.07 moles of Si reacts with 0.156 moles of Bromine
The mole ratio of Si to Br2 is 1:2 (from the equation)
Ideally, o.14 moles of Bromine should react with Silicon but 0.156 is reacting instead. This says that Bromine is in excess and hence silicon is the limiting reagent.
Hope my answer it clear enough...

Heyz...Will u be giving chem tommorow?

 

[Tanvi Shah]

Heyz...Will u be giving chem tommorow?

Yesssshhhh..... wht about u?

 

[Prathmesh Thakkar]

Wonderful thanks.

Now moving on to chemistry, I hope you don't mind me asking you all these questions but you are very helpful.

First variant paper, question 9ci.
http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s09_qp_3.pdf

This is the answer:
silicon is limiting reagent
0.07 moles of Si and 25/160 = 0.156 moles of Br2
because 0.14 (2 × 0.07) < 0.156
If 80 used to find moles of Br2 the mark 1 and 3 still available arguments based on masses can be used

Can you please explain "because 0.14 (2 × 0.07) < 0.156 "

SOrry to take time to reply but i guess tanvi cleared it for you

 

[Prathmesh Thakkar]

Here goes updates from my side....
CHemistry: