AQA GCSE Combined Triology Chemistry Higher paper 2 12 June 2019 unoffical markscheme

The 6 marker, here is what I put.

For manufacturer, car C releases more CO2 and so increases its carbon footprint in comparison to A and B. However, for driving, car B produces a larger mass of CO2, suggesting it is heavier. The total mass from manufacture and driving 40000km, car C increases its chance of a higher carbon footprint due to its excess release of Carbon, suggesting the car is large or intricate. Although for the total mass of manufacture and driving 100000km, car C releases the most Co2.
To conclude, I believe Car B has the most significant carbon footprint due to the total mass values equaling higher than those of A and C.

How many marks would I get?

Reply 24

I put equilibrium shifted to the left due to equilibrium wanting to reduce change and therefore shifting to the one with most moles.

Reply 25

For the experiment, please tell me I was supposed to do the evaporating basin experiment with a mass balance, then with the tripod, Bunsen burner and gauze? ...

Reply 26

Unknown _person

Did anyone get 31 the 4 marker

Reply 27

Hahhshs

I got all those too

Original post by THE-BLACK-CAT

post your answers ! ^^
Percentage question - 8.8%
Moles question - 0.002 (2x10^-3)
Last calculation question - 15 g

Reply 28

For the question about nitrogen oxide a in a car engine, I guessed and put car undergoes combustion through burning O2 and oxides of nitrogen are a product.

For the one where you had to speak about chromatography not including the practical, I said the solvent allows the mixture to be spread across the solute.

For the one about carbon and ethanol ??? I just said CO2 will always contain carbon as ethanol will. I said something about fermentation because I got stuck.

Reply 29

ec2308

5

I put 310 but now I’m not sure 😂😂

Reply 30

Sophie.32

Original post by THE-BLACK-CAT

post your answers ! ^^
Percentage question - 8.8%
Moles question - 0.002 (2x10^-3)
Last calculation question - 15 g

I got all of these, hopefully there right!! 😁

Reply 31

sqrt of 5

19

0.031 for the first 4 marker
8.8 percent for the percentage question
0.002 for the moles question
15 g for the mass question

Reply 32

Sophie.32

Original post by Georgiax71x

For the experiment, please tell me I was supposed to do the evaporating basin experiment with a mass balance, then with the tripod, Bunsen burner and gauze? ...

That’s what I did 🤞🏻

Reply 33

sqrt of 5

19

Original post by Georgiax71x

The 6 marker, here is what I put.

For manufacturer, car C releases more CO2 and so increases its carbon footprint in comparison to A and B. However, for driving, car B produces a larger mass of CO2, suggesting it is heavier. The total mass from manufacture and driving 40000km, car C increases its chance of a higher carbon footprint due to its excess release of Carbon, suggesting the car is large or intricate. Although for the total mass of manufacture and driving 100000km, car C releases the most Co2.
To conclude, I believe Car B has the most significant carbon footprint due to the total mass values equaling higher than those of A and C.

How many marks would I get?

if you included date from the table and concluded by saying that C is the one with the higher cqrbonfoot print the yes

Reply 34

1st superstar

OP

22

dammit! i didn't write in in the answer line as the way the question was worded put me off from writing it in the line

Original post by sqrt of 5

0.031 for the first 4 marker
8.8 percent for the percentage question
0.002 for the moles question
15 g for the mass question

Reply 35

Natalia15

4

The one for chromatgraphy was that the dyes have different solubilities therefore they are attracted to the paper differently and go up different distances

Original post by Georgiax71x

For the question about nitrogen oxide a in a car engine, I guessed and put car undergoes combustion through burning O2 and oxides of nitrogen are a product.

For the one where you had to speak about chromatography not including the practical, I said the solvent allows the mixture to be spread across the solute.

For the one about carbon and ethanol ??? I just said CO2 will always contain carbon as ethanol will. I said something about fermentation because I got stuck.

Reply 36

sqrt of 5

19

Original post by Georgiax71x

Last 4 marker this is as far as I got.
Sun is emitted as short wave radiation. It is absorbed as long wave infra red radiation. This is then absorbed by greenhouse gases, causing the earth to warm and the greenhouse effects. Things such as ice clads melting and a disruption in migration patterns are a result of this.

no they are not absorbed as longwave. they are deflected back as longwave radiation which are then absorbed by the greenhouse gases which re radiate them in all directions

Reply 37