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AQA Chemistry Unit 2&3 15/05

What did you put for the questions???
Reply 1
I'm confused about the amount of magnesium oxide question in the C2 paper
Reply 2
I got 2 tonnes.
You divide the mass of whatever was given by its relative formula mass then multiply it by the other ones formula mass. (sorry I don't remember the order of the question)
Reply 3
I also got 2 tonnes.
Reply 4
I got 2.008 whatever and I wrote that instead of 2 on the answer bit and then I put 2 to 1 dp, will I get the mark
Reply 5
Could you show the calculations you did to get that...?
What did everyone put for the question about iron sulfate in unit 3? I put it was copper sulfate cause in test one it was a blue precipitate.
For the question about the haber process did u circle 400?
2 reason why governments want to change to hydrogen fuel cells?
Reply 7
Original post by AlphaNick
1.2 * (40 / 24) = 2.0 tonnes


What? My method works too as it got the right answer and was taught to me by my teacher -_-
Original post by dana_kirsh
What did everyone put for the question about iron sulfate in unit 3? I put it was copper sulfate cause in test one it was a blue precipitate.
For the question about the haber process did u circle 400?
2 reason why governments want to change to hydrogen fuel cells?


Copper sulphate is correct. And for the Haber Process I circled 100, because it was when the highest one, A, started to plateau or whatever.
Reply 9
I put 400 because I thought you increase the pressure in the haber process to increase the yield
In that case I've probably messed up my Chemistry exam then. :/

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