Chemistry: Post your doubts here!

[A*****]

Mg + O2 = MgO
2Al + 1.5O2 = Al2O3
S + 1.5O2 = SO3
Rest is self explanatory.

Do we take S or S8??

 

[A*****]

Help Needed urgent

It is B bqz attaching on the methyl groups will result in the same molecule beimg made so attaching on 1 methyl group and the other 2 carbons gives B

 

[Kanekii]

Do we take S or S8??

won't the S8 bonds be broken since its heated in excess oxygen?

 

[Hisham Khan]

It is B bqz attaching on the methyl groups will result in the same molecule beimg made so attaching on 1 methyl group and the other 2 carbons gives B

We take S8

 

[Kanekii]

We take S8

lol wrong quote

 

[A*****]

won't the S8 bonds be broken since its heated in excess oxygen?

No idea

 

[A*****]

We take S8

Well the graph should not have shown 1.5 moles of oxygen then

 

[Ebrahim12]

Help And Explain.View attachment 64030 View attachment 64031 View attachment 64032

q18.
A) NH4+ does not NH3
B) NH3 is the one that accepts the H+
C) Changes from 107 in NH3 to 109.5 in NH4+, since NH4+ has a tetrahedral arrangement
D) This is the correct answer. H+ doesn't have any electrons, the bond is dative

Look at the mechanism to understand this better.

q4.
Only C has Hydrogen bonding which is stronger than the induce/permanent dipole IMFs of the other options.

q37.
Here's the mechanism:

Clearly 1 and 3 are correct, so the answer is A. I'm not sure what 2 is referencing exactly but I guess it's the collision between the OH ion and the haloalkane.

 

[Kanekii]

Help Needed urgent

Attacks on CH3, CH3CH2 and CH2
therefore 3 'B'

 

[Hisham Khan]

 

[Kanekii]

th

q18.
A) NH4+ does not NH3
B) NH3 is the one that accepts the H+
C) Changes from 107 in NH3 to 109.5 in NH4+, since NH4+ has a tetrahedral arrangement
D) This is the correct answer. H+ doesn't have any electrons, the bond is dative

Look at the mechanism to understand this better.

q4.
Only C has Hydrogen bonding which is stronger than the induce/permanent dipole IMFs of the other options.

q37.
Here's the mechanism:
View attachment 64036
Clearly 1 and 3 are correct, so the answer is A. I'm not sure what 2 is referencing exactly but I guess it's the collision between the OH ion and the haloalkane.

thank you

 

[Kanekii]

View attachment 64025
help?

HEATED
S8 is a simple molecular structure so its bonds broken..

 

[Ebrahim12]

Help and ExplainView attachment 64033 View attachment 64034

q22.
Sketch the products when the hot Mno42-/H+ breaks the double bonds:
A) forms an acid and a ketone
B) forms two different acids
C) forms a dicarboxylic acid (two co2h gps attached to the same molecule)
D) forms two acids but they have the same formula

answer is B

 

[Kanekii]

View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038 View attachment 64038

i have imaginary ceo friend of caies he says S8 is wrong...laahh

 

[Kanekii]

q22.
Sketch the products when the hot Mno42-/H+ breaks the double bonds:
A) forms an acid and a ketone
B) forms two different acids
C) forms a dicarboxylic acid (two co2h gps attached to the same molecule)
D) forms two acids but they have the same formula

answer is B

how B forms two different acids but D doesnt?
thank you so much for your help

 

[Ebrahim12]

how B forms two different acids but D doesnt?
thank you so much for your help

Imagine a line through the double bond in D, see how the previously double bonded carbon atoms are attached to the same group? both will form 2-methypropanoicacid. While in B they are attached to different groups.

 

[Mts.99]

what are electrodes made out of in electrolysis of brine?

 

[Tajrina Promela]

Why is the answer C?

 

[Hisham Khan]

what are electrodes made out of in electrolysis of brine?

Electrolyisis is not in As 2018 syllabus

 

[Hisham Khan]

i have imaginary ceo friend of caies he says S8 is wrong...laahh

I have never said S8 was wrong.What??
And the teacher is Mr Faiz.You can check him on facebook if you think I was beingg a liar like seriously tf dude??