Edexcel gcse chemistry- how did you find it?

it goes down x

Anyone reckon what the grade boundaries might be?

I stated it exactly how it was in the revision guide - 1/1840. I did put in brackets underneath my answer 'negligible' as well though.

Easy???? :0

very true, I just didn't realise my experiment was legit hahaha

Is a period going down or across and what do you reckon it is for a C grade?

yep you could just make a few adjustments to this and it would be fine, this was on a chemistry past paper and i forgot to say light the magnesium which im annoyed about as i nearly wrote it

I didn't say that either dw!! At least the rest of the paper made up for it

the grade boundaries wouldbe 24-27 for a C

What was the question everyone got 35% as the answer? I got 30% because i must have misread it, also what was the question to do with finding 'how many tonnes can fill 500 tonnes' something like that.

0.7 - 0.42 to get 0.28 (mass of oxygen)

0.28 / 16 = 0.0175 (O)
0.42 / 24 = 0.0175 (Mg)
Then divide each by the smallest (but since they're the same just divide by themselves)
0.0175 / 0.0175 = 1 (O)
0.0175 / 0.0175 = 1 (Mg)
Ratio is therefore 1:1
So it's therefore MgO

yeah you could loose 6 marks and still get A* doesn't matter

Don't think so. Text book example is MgO

Was that question about the percentage mass of nitrogen to do with the formula: NH₄NO₃?

What did you guys write for thw concentration question?

greater concentration means more particles are in the same volume therefore more frequent collisions and greater rate of reaction