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    Hey all, I absolutely love chemistry and am taking my GCSE in it soon. However, the one thing that I really do struggle with sometimes is mole calculations. I can easily do the basic mole calculations and calculations that factor in a ratio, but I really did not understand this question that I came across today. Please help!

    I managed to get an A* overall in the paper, but I feel as though moles calculations will be what ultimately lets me down.

    I have attached photos of the question and also my workings out, please don’t laugh at them. I managed to get one mark out of three, but ideally I would be wanting to get three out of three.

    Thanks!

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    (Original post by ?Hannah?)
    Hey all, I absolutely love chemistry and am taking my GCSE in it soon. However, the one thing that I really do struggle with sometimes is mole calculations. I can easily do the basic mole calculations and calculations that factor in a ratio, but I really did not understand this question that I came across today. Please help!

    I managed to get an A* overall in the paper, but I feel as though moles calculations will be what ultimately lets me down.

    I have attached photos of the question and also my workings out, please don’t laugh at them. I managed to get one mark out of three, but ideally I would be wanting to get three out of three.

    Thanks!

    Attachment 703572

    Attachment 703574
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    (Original post by charco)
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    oh no, that’s really strange! i posted this via the student room app. i will try and post the attachments again using the web version
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    Name:  06535B60-BB2E-434D-87A1-4C50251EBCEA.jpeg
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    (Original post by ?Hannah?)
    Name:  06535B60-BB2E-434D-87A1-4C50251EBCEA.jpeg
Views: 8
Size:  162.7 KB
    Why have you written "ratio=1:2" ?
 
 
 
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