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F321 27th May 2016

Let's discuss answers!

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Reply 1
Avatar for TSR121
TSR121
3
First calculation about atoms/molecules ?
Original post by TSR121
First calculation about atoms/molecules ?


8.5 x 10^-4????
Reply 3
Avatar for abbey1
abbey1
1
I got 1.7 x10 to the power of -3 for the amount of nitrogen one???
Reply 4
Avatar for abbey1
abbey1
1
yeah I wrote dumbbell/figure 8 shape
1200 for volume of gas?????

Posted from TSR Mobile
I forgot Nitrogen was triple covalent though so lost marks on that :frown:p

Posted from TSR Mobile
Reply 7
Avatar for sqr00t
sqr00t
2
Original post by Rebeecccaahh
8.5 x 10^-4????


That wasnt the first question. The first calculation was something like 2.11 something times 10^20 of nitrogen molecules. Divide that by avocado's number to find moles.

The 8.5x10^-4 mole was the Al2(SO3)3 one i remember. Then multiply by Mr to find mass of it.
Reply 8
Avatar for abbey1
abbey1
1
Original post by bethknott
1200 for volume of gas?????

Posted from TSR Mobile


I got that too!!:biggrin:
Reply 9
Avatar for sqr00t
sqr00t
2
Spherical for s orbital, dumbbell for p.
Reply 10
Avatar for Goshe
Goshe
4
what did you guys put for the question on energy levels? and the last dot&cross diagram?
Reply 11
Avatar for sqr00t
sqr00t
2
Original post by bethknott
1200 for volume of gas?????

Posted from TSR Mobile


I got 864 or something in the mid 800s, are u sure ur mole ratio was 2:5?
Reply 12
Avatar for Roz96
Roz96
10
What was the last cross and dot diagram ?


Posted from TSR Mobile
Original post by bethknott
1200 for volume of gas?????

Posted from TSR Mobile


yup there were 5 moles in total so 1200
Reply 14
Avatar for Goshe
Goshe
4
shite.
and for the last q?
Original post by sqr00t
That wasnt the first question. The first calculation was something like 2.11 something times 10^20 of nitrogen molecules. Divide that by avocado's number to find moles.

The 8.5x10^-4 mole was the Al2(SO3)3 one i remember. Then multiply by Mr to find mass of it.


wasn't the molecules or something equal to 5.117 x 10^20?? then divided by avo constant??
What did you guys get for the last question?
Reply 17
Avatar for SamH213
SamH213
1
I got 1200, 0.120, 8.5x10^-4 or x10^-3, 66.44 for the calculations that i can remember and i wrote hourglass shape! Dumbell and figure 8 didnt cross my mind at the time!
what did you guys put for the 'lowest first ionisation energy, lowest fourth ionisation energy and lowest boiling point'??
Reply 19
Avatar for SamH213
SamH213
1
Original post by Rebeecccaahh
what did you guys put for the 'lowest first ionisation energy, lowest fourth ionisation energy and lowest boiling point'??


Sodium silicon and neon

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