[Zhy]

Crammers gonna cram.

[Kreayshawn]

(Original post by dongonaeatu)
no that is wrong
it is cnh2n-2

cyclopentene is c5h8

you don't need to know about alkenes only alkanes for f331

[Salmonidae]

(Original post by dongonaeatu)
what is the formula of a cycloalkene? as in cn...

(Original post by dongonaeatu)
no that is wrong
it is cnh2n-2

cyclopentene is c5h8

Very sorry, my mistake - misread as cyclopentane!

[dongonaeatu]

Ok im going to college now. Good luck everyone and god bless.

[AGrumpyMole]

What was the answer to the volume of air question?

[megank]

(Original post by AGrumpyMole)
What was the answer to the volume of air question?

omG !!! that was so weirdly worded... :/ got me confused

[AGrumpyMole]

(Original post by megank)
omG !!! that was so weirdly worded... :/ got me confused

I know haha
I got 3.57 dm3, though :/

[Reina]

(Original post by AGrumpyMole)
What was the answer to the volume of air question?

I did:

60cm3 = 0.06dm3
0.06dm3 x 12.5 = 0.75dm3
0.75/21 x 100 = 3.57dm3

May be completely wrong, but it seemed like the logical thing to do at that moment in time...

Overall, an awful paper :'(

[hannah1994]

(Original post by AGrumpyMole)
I know haha
I got 3.57 dm3, though :/

I got that
do you reckon anyone will put a mark scheme up?

[megank]

(Original post by Reina)
I did:

60cm3 = 0.06dm3
0.06dm3 x 12.5 = 0.75dm3
0.75/21 x 100 = 3.57dm3

May be completely wrong, but it seemed like the logical thing to do at that moment in time...

Overall, an awful paper :'(

YAY!!! thats exactly what i did too... hope its right

[AGrumpyMole]

(Original post by megank)
YAY!!! thats exactly what i did too... hope its right

AOOWWW MMMYYYY GGOOOWWWWWDDDDDDD. Niice.

[megank]

(Original post by AGrumpyMole)
AOOWWW MMMYYYY GGOOOWWWWWDDDDDDD. Niice.

I know haha! but to be fair i thought this paper was much harder than the january 12 one.. argh why didnt i do better in that one

[matty b]

(Original post by AGrumpyMole)
What was the answer to the volume of air question?

Something along the lines of 3.57. 21% of that was the volume of 0₂, thats how i checked.

How did we draw the ionic bond? Did the Na have 8 electrons in the outer shell, or none?

In other words, was it like this:



or like this:

[TheToothFairy :)]

That was a horrible paper, I did the one in Jan as well and that was so much easier, I'm so annoyed with myself that I didn't do better in that one!

[megank]

(Original post by matty b)
Something along the lines of 3.57. 21% of that was the volume of 0₂, thats how i checked.

How did we draw the ionic bond? Did the Na have 8 electrons in the outer shell, or none?

In other words, was it like this:



or like this:

Either one is correct....

[billybobs]

(Original post by matty b)
Something along the lines of 3.57. 21% of that was the volume of 0₂, thats how i checked.

How did we draw the ionic bond? Did the Na have 8 electrons in the outer shell, or none?

In other words, was it like this:



or like this:

I think the top one is "chemically correct" because it is the outermost shell which has lost the electron - the shell still exists even with no electrons, but I reckon you could get away with both

[tasniaa]

(Original post by Reina)
I did:

60cm3 = 0.06dm3
0.06dm3 x 12.5 = 0.75dm3
0.75/21 x 100 = 3.57dm3

May be completely wrong, but it seemed like the logical thing to do at that moment in time...

Overall, an awful paper :'(

that sounds about right.
I completely failed that question.
Other than that everything was okay?

[megank]

(Original post by TheToothFairy :))
That was a horrible paper, I did the one in Jan as well and that was so much easier, I'm so annoyed with myself that I didn't do better in that one!

same!! i made so many careless mistakes back then

[billybobs]

That paper was beautiful, only disruptive question was 4c about the melting points of arsenic and gallium, but I worked it out in the end

[Reina]

(Original post by matty b)
Something along the lines of 3.57. 21% of that was the volume of 0₂, thats how i checked.

How did we draw the ionic bond? Did the Na have 8 electrons in the outer shell, or none?

In other words, was it like this:



or like this:

I put the second one...but it might not really matter which one you draw as long as you show the eight on the outer shell of Na are all from the same atom?

What did everyone get of the empirical formula?