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AQA AS Chemistry unit 1 resit May 27th 2016

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Reply 80
72.76% for percentage yield?
Reply 81
Original post by Danny786
Was good I think. Does anyone remember any of their values at all?!


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Hey that mol question for phosphorous oxide... I got like 1053kg
Then 49.2% yield, the one above with PV=nRT I got 0.113m3
C3O8C2HC

Erm... I didn't have enough time to balance the equations! Also, I got 28.something for the Mr
Reply 82
Original post by Danny786
The percentage yield one?


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Na the mass off P4O10
Reply 83
unofficial mark scheme?
I got 49.23 i think for the percentage yield and got a massive number for the one before 1065000? Or something cant remember 😂
49.3 ish for percentage yield .Think I got it wrong :///
Reply 86
Original post by 97Y
Hey that mol question for phosphorous oxide... I got like 1053kg
Then 49.2% yield, the one above with PV=nRT I got 0.113m3
C3O8C2HC

Erm... I didn't have enough time to balance the equations! Also, I got 28.something for the Mr


yeah same here balanced eqs were cucl2 but hcl to the product and h20 and co2 forgot exact nujbers
That did anyone get for the volume and percentage yield ?


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Reply 88
Original post by anonymous16161
49.3 ish for percentage yield .Think I got it wrong :///


That's what I got! Let's hope that we're both right
Reply 89
was the SF4 square planar
I put 49.2 for percentage yield
And I got 0.451m3
Cos it's 101 000 pascals, 773K


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Original post by 97Y
That's what I got! Let's hope that we're both right


Same.

Did you get the empirical formula as Ca3C2O8H2?
Sf4 bond angle 107???
Sf6 90 and octahedral?


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Original post by MotorboatMyGoat
Same.

Did you get the empirical formula as Ca3C2O8H2?


Was it copper or calcium?!?


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Reply 94
Original post by Danny786
Was it copper or calcium?!?


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swear it was copper D:
Original post by berries366
I got 49.23 i think for the percentage yield and got a massive number for the one before 1065000? Or something cant remember 😂


i got a big number like 1065000 too but my Percentage yield was something like 23% since i thought you couldn't use moles to calculate H2S04's mass since it was aqueous?
Original post by MotorboatMyGoat
Same.

Did you get the empirical formula as Ca3C2O8H2?


I got cu3(oh)3 (Co3)2
Original post by Danny786
Was it copper or calcium?!?


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i got the same empirical formula :smile:
Original post by sr111
swear it was copper D:


It was definitely copper
Original post by gee_1598
It was definitely copper


I didn't bracket it though. For the volume question did you get 0.451m3 by any chance?


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