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It was a 2- ion
Original post by grebnesieH
i thought no. protons =no. electrons
unless it was an ion??.
unless it was an ion??.
Original post by fares22
yh thats what i did.
what elements did you put
Original post by swirlingseas
It was a 2- ion
damn i didnt see that.
Manganese and bromine
Original post by grebnesieH
what elements did you put
Original post by joshxieee
How did you work out the last question about the molecular formula for the haloalkane?
you had to find no. of moles by
volume ÷ the other number (dm^3mol^-1)
then you do Mr = m / n
Use Mr to find how many chlorines and hydrogens (you knew there were 4 carbons)
Original post by fares22
Manganese and bromine
I definitely did it wrong then. I didnt realise they were ions
Was it 10cm3
what was the standard conditions? 101Kpa and 138 K?
Original post by grebnesieH
I definitely did it wrong then. I didnt realise they were ions
Original post by fares22
what was the standard conditions? 101Kpa and 138 K?
138K??? I thought it was room temp. so i put 298K
Original post by thekidwhogames
Was it 10cm3
how did you do it. I guessed 12
i made up some next ****, do u reckon ill get any marks for doing the flame test or na?
yeah I put 298K and 100kPa
Original post by grebnesieH
138K??? I thought it was room temp. so i put 298K
Original post by grebnesieH
138K??? I thought it was room temp. so i put 298K
Yeah it’s 298K and 100KPa
Also what did everyone get for that concentration of HCl?
i got 3.1 but i dont think its right
i got 3.1 but i dont think its right
Original post by dylan_sian
i made up some next ****, do u reckon ill get any marks for doing the flame test or na?
If its a valid test they have to give you the marks even if its not in the spec. I think ammonia turns the flame yellow
Original post by dylan_sian
Also what did everyone get for that concentration of HCl?
i got 3.1 but i dont think its right
i got 3.1 but i dont think its right
I got like 0.301
Original post by Ryan0887
Grade boundary predictions ?
Last year it was 55/70 in Breadth to get an A
some of mates got that but i dont see how, i think this paper on a whole was badly worded, 2016 and 2017 papers were much nicer.
I got 0.309
Original post by grebnesieH
I got like 0.301
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