AQA GCSE Chemistry Paper 2 Unofficial Markscheme (Higher) - Triple - 12/06/19

How did that exam go?

I got 2886.4 for the volume but I’m not convinced that’s right

Anyone get the answer formulation for the tablet one?

Balancing the equation?

For the oxygen question, I believe the correct answer is 1250cm^3
The equation had 5 moles of oxygen reacting to produce 3 moles of carbon dioxide. The values given were 7.25 dm^3 of oxygen and 3.6 dm^3 of carbon dioxide produced.
To find the volume of oxygen that reacted, you do 3.6*(5/3) to get 6 dm^3 of oxygen. This, taken away from the initial volume of oxygen gave us 1.25 dm^3 of unreacted oxygen.
1.25 dm^3 = 1250 cm^3

One reason high pressure wasn’t used can be for safety , higher than 200 atmospheres is dangerous both are correct!

I got 2886.4 for the volume but I’m not convinced that’s right

Anyone else get 17% for atom aconomy question?

1250 for volume or 750?

So amirite or amirong?

1250 for volume or 750?

I got 700 something. Tried using gas moles and dividing it all by 24 to get miles but hadn’t a clue

Anyone else get 17% for atom aconomy question?

What was the3 mark on mean rate of reaction between two and 4

I got 9.75 but am not sure if that is right

for the balancing was it like 1,1.5 or something kike that

for the balancing was it like 1,1.5 or something kike that