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    (Original post by sr111)
    swear it was copper D:
    Yeah! It was a copper carbonate, phew, someone just said calcium and I got so worried
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    (Original post by 97Y)
    Yeah, but I have a feeling that I wrote Cu by accident.. But I got those numbers
    i think i may have wrote cu also
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    (Original post by Ultracrepidarian)
    was it not a square planar
    I got 4 bonding pairs one lone pair and trigonal bipyrimidal
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    (Original post by sr111)
    I got chlorine
    It had to be an element in group 6 and in period 3 so must be sulfur
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    Empirical formula Cu2(oh)2(CO3)2 and sf4 is 89 and sf6 is 90
    I got yield 49.3.
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    (Original post by 97Y)
    Yeah, but I have a feeling that I wrote Cu by accident.. But I got those numbers
    it was copper dont worry
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    (Original post by Ultracrepidarian)
    how did you get that what did you divide 1.09 by
    i got the theoretical yield of the product to be formed i.e found the mass then divided 1.09 by that mass and multiplied by 100
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    (Original post by Charco63)
    107 is for 3 bonding pairs and 1 lone pair
    Yes I know but remember this was a tetrahedral which has a angle of 109.5 and a lone pair which reduces it by 2-2.50 and that's how I came to 107.5. I'm not saying I'm correct, that's just what I thought so I could be wrong.
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    (Original post by Engineerrookie)
    Empirical formula Cu2(oh)2(CO3)2 and sf4 is 89 and sf6 is 90
    I got yield 49.3.
    how did you get that yield
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    (Original post by 97Y)
    Yeah, but I have a feeling that I wrote Cu by accident.. But I got those numbers
    My bad it is copper
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    (Original post by Ultracrepidarian)
    was it not a square planar
    It was a seesaw shape, 2 Bonds 180 apart, 2 90 apart with a lone pair on top.
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    what did you guys get for the similarity and difference between the two spectra??
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    (Original post by Ultracrepidarian)
    how did you get that yield

    Moles of actual acid / moles of theretical x 100
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    (Original post by RME11)
    It was a seesaw shape, 2 Bonds 180 apart, 2 90 apart with a lone pair on top.
    i got my angles mixed up but i drew that so ill lose the angle mark
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    What was question 6 again?
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    (Original post by joyl)
    what did you guys get for the similarity and difference between the two spectra??

    Similarity is total abundance

    Difference is small peaks due to higher energy gun causing double charged ions
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    (Original post by Engineerrookie)
    Moles of actual acid / moles of theretical x 100
    nevermind crap i see where i went wrong i worked out atom economy instead of yield.

    also for the mass question what did you get
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    (Original post by Ultracrepidarian)
    was it not a square planar
    I don't think so because a square planar has 1 lone pair and a single electron so the single electron goes at the top and pair of electrons at the bottoms which pushes the 4 bonds between them, 2 on each side. I was thinking about that but I didnt remember the angle for it so I went for the 107.5
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    (Original post by jadeskittles)
    I put chlorine too.

    Buuuut I just googled the ionisation energies and sulfurs is 1000 which was the FIE so it must be sulfur.
    Sulphur, as it was 6 electrons till the next shell - you could see the jump
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    (Original post by RME11)
    It was a seesaw shape, 2 Bonds 180 apart, 2 90 apart with a lone pair on top.
 
 
 
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