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GCSE Edexcel C2 Last Question

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    How many marks would I get for the 6 marker?

    I described the gas syringe experiment where you add oxygen from the syringe to magnesium ribbon held in a test tube. I did the empirical formula method right but made a stupid mistake where I put oxygen as 32 instead of 16 because I thought the relative atomic mass had to be the mass of O2.

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