How was p12 9701 2017

[ughkno]

was it 4s completely filled or just filled?

I am sorry really I can't remember - what did you mark as the answer?

 

[Zaki ali asghar]

I did it A.

 

[ughkno]

I did it A.

me too - but my friend said that copper is not properly filled to half stability

 

[Hassan (SHT)]

The answer was B, this is what i Did btw filled means (completely filled) otherwise examiner would have clarified, Cupper has electronic configuration [Ar] 4s1 3d10. therfore option 3 having Cu is wrong

 

[haithsoul]

Answer was B, they asked completely filled copper 4s shell is not filled.

 

[haithsoul]

What about the ammonia question on 2 dm3 only 75% react what was the mass?

 

[Hassan (SHT)]

What about the ammonia question on 2 dm3 only 75% react what was the mass?

It was 15 % that react bhai

 

[Zaki ali asghar]

0.425g

 

[Hassan (SHT)]

0.425g

exactly

 

[Dukula Jayasinghe]

I got '31' wrong. I got confused by the question and put D. But correct answer was B. Others were ok i guess.

 

[Laveeza]

The answer was B, this is what i Did btw filled means (completely filled) otherwise examiner would have clarified, Cupper has electronic configuration [Ar] 4s1 3d10. therfore option 3 having Cu is wrong

Yay

 

[haithsoul]

But 1 mole of nitrogen gives 2 mol of ammonia. 0.425 is for 1 mole only???

 

[haithsoul]

Can anyone clarify?

 

[Laveeza]

Can anyone clarify?

No this is for 2

 

[Hassan (SHT)]

Can anyone clarify?

24 dm3 of N2 ----------> 34 g of Ammonia
2 dm3 of N2 ---------> x g of Ammonia

X = 2.8333 this is the mass if whole N2 of 2 dm3 would have reacted, but only 15% reacted with H2
So the final answer would be 15% of X that is (0.15 * 2.8333) = 0.425g

You can follow another method
15% of 2 dm3 is o.3 dm3
Hence
24dm3 ------> 34 g of Ammonia
0.3 dm3 -------> Y g of Ammonia

Therfore Answere will be same
Y = ((0.3*34)/24)
Y= 0.425g

 

[anastasia grey113]

I did it A.

i got confused
i did A too :/
just realized it was post to b B :/

 

[Laveeza]

i got confused
i did A too :/
just realized it was post to b B :/

Yo meri beti from jahanum

 

[anastasia grey113]

Yo meri beti from jahanum

m panicked right now cuz i got one wrong :/

 

[Laveeza]

m panicked right now cuz i got one wrong :/

Wtf you want them all right .....goals beta goals

 

[Laveeza]

What the effff seriously bro !?!