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Help with some Maths in chemistry?? OCR A2 Watch

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    I get two different answers depending on how i solve this question. Can anyone work this out?Name:  IMG_20160117_144607387.jpg
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    (Original post by SchwannCells)
    I get two different answers depending on how i solve this question. Can anyone work this out?Name:  IMG_20160117_144607387.jpg
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    You appear to have forgotten how to multiply numbers. (x^a)(x^b) \equiv x^{a+b} \not{\equiv} x^{ab}.
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    (Original post by morgan8002)
    You appear to have forgotten how to multiply numbers. (x^a)(x^b) \equiv x^{a+b} \not{\equiv} x^{ab}.
    Ohh okay, thanks
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    Hi SchwannCells

    Attached below is an image which should help. Write out all of the units on the top and bottom of your equation/fraction. Then cancel out those which are the same. This leaves you with s-1 and moldm-3, BUT the moldm-3 is now technically 1/moldm-3 so you are left with mol-1dm3. The image should help. If you need more help, check out my totally free website www.scienceskool.co.uk

    Have fun

    Alex

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    (Original post by ajsullivan)
    Hi SchwannCells

    Attached below is an image which should help. Write out all of the units on the top and bottom of your equation/fraction. Then cancel out those which are the same. This leaves you with s-1 and moldm-3, BUT the moldm-3 is now technically 1/moldm-3 so you are left with mol-1dm3. The image should help. If you need more help, check out my totally free website www.scienceskool.co.uk

    Have fun

    Alex

    Name:  Answer Photo.jpg
Views: 38
Size:  386.5 KB
    Thank you so much
 
 
 
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