Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    0
    ReputationRep:
    Im finding Gold really hard i there any tips i can have im trying to figure out the atomic packing efficiency is this right and if so where do i go next?
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    Im finding Gold really hard i there any tips i can have im trying to figure out the atomic packing efficiency is this right and if so where do i go next?
    Yes it's about packing efficiency! There are different types of packing strictures eg. hcp- hexagonal closest-packed, ccp- cubic close packed etc. You have to find out what the two metals' structures are and then their packing efficiencies. Don't give up, you're almost there! Hope that helped
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    Yes it's about packing efficiency! There are different types of packing strictures eg. hcp- hexagonal closest-packed, ccp- cubic close packed etc. You have to find out what the two metals' structures are and then their packing efficiencies. Don't give up, you're almost there! Hope that helped
    What equation would you use. And thank you
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    What equation would you use. And thank you
    The equation is

    number of atoms per cell x volume of one atom
    volume of unit cell

    but you really don't have to use that! I got the values by just googling and it's a lot easier haha
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    The equation is

    number of atoms per cell x volume of one atom
    volume of unit cell

    but you really don't have to use that! I got the values by just googling and it's a lot easier haha
    Is there a helpful website because i'm finding it very hard to find the answers and I not smart enough to work it out. But you have been a fantastic help thank you!!!!!!!!!
    Offline

    10
    ReputationRep:
    Stuck on gold, someone help before i go insane
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    Is there a helpful website because i'm finding it very hard to find the answers and I not smart enough to work it out. But you have been a fantastic help thank you!!!!!!!!!
    Don't have a specific website but here are the percentages:
    FCC (face centred cubic)- 74.05%
    CCP (cubic close packed)- 74.05%
    HCP (hexagonal close packed)- 74.05%
    Non-close packed- 69.2%

    You should be able to take it from here!
    Offline

    2
    ReputationRep:
    (Original post by ChloeBazingaa)
    Stuck on gold, someone help before i go insane
    Read my stuff from before!
    But in case tl;dr, it's basically about packing efficiencies- how well particles are stacked in a lattice (hence the ball pit). There is a formula to figure the percentage out but from experience, it's just a lot of (unnecessary) work. Find out what structures the two metals have and then use the percentages I posted in the reply right before this to find the answer!
    Ps. If you don't know what structures I'm talking about, just read the last page or so in this thread- should be very clear. Have fun!
    Offline

    2
    ReputationRep:
    I've got the names for the copper q molecules (with the pic of earth with '100yrs' on it) but can't find out what the numbers mean aha...
    Offline

    2
    ReputationRep:
    global warming potential isn't working i'm stuffed aha
    Offline

    2
    ReputationRep:
    (Original post by Nat_LPS)
    global warming potential isn't working i'm stuffed aha
    No! Don't give up! You're pretty much already there- it is about the global warming potential! ! Just identify the substance and you'll easily find its gwp.
    Enjoy the challenges- don't get too frustrated! :cool:
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    Don't have a specific website but here are the percentages:
    FCC (face centred cubic)- 74.05%
    CCP (cubic close packed)- 74.05%
    HCP (hexagonal close packed)- 74.05%
    Non-close packed- 69.2%

    You should be able to take it from here!
    Haha the funny thing is I got that far with my calculations but where I go from here is always wrong. Could you hint anymore or would that make it to easy. But if not that's ok because you have been a huge help.
    Thank you
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    Haha the funny thing is I got that far with my calculations but where I go from here is always wrong. Could you hint anymore or would that make it to easy. But if not that's ok because you have been a huge help.
    Thank you
    You're welcome and well I could but I want you to do the final step yourself because I mean, at the end of the day, it is supposed to challenge you.
    It doesn't even require any thinking at all for goodness sake- even the wikipedia pages will have the answers! Then it's just a matter of substituting the percentages in!
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    You're welcome and well I could but I want you to do the final step yourself because I mean, at the end of the day, it is supposed to challenge you.
    It doesn't even require any thinking at all for goodness sake- even the wikipedia pages will have the answers! Then it's just a matter of substituting the percentages in!
    Your right I have just done it. I was getting so bogged down with the complicated chemistry I just forgot how to do simple maths.


    Thanks again your the best!!!!
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    Your right I have just done it. I was getting so bogged down with the complicated chemistry I just forgot how to do simple maths.


    Thanks again your the best!!!!
    Woop woop well done! Heh thanks it's quite alright!

    Ps. is your name actually john smith because pocahontas
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    Woop woop well done! Heh thanks it's quite alright!

    Ps. is your name actually john smith because pocahontas
    hahahah no i'm a doctor who fan so it's what the doctor calls him self but I wasn't meant to put in the l
    Offline

    2
    ReputationRep:
    (Original post by john smilth)
    hahahah no i'm a doctor who fan so it's what the doctor calls him self but I wasn't meant to put in the l
    ah! you excited for the day of the doctor then?
    Offline

    0
    ReputationRep:
    (Original post by fizzers)
    ah! you excited for the day of the doctor then?
    Yep going to watch in in the cinema!!!!!!
    Offline

    0
    ReputationRep:
    Can anyone help with silver? Ive been trying for aaggeeeeesssss.
    Thanks


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by Swag hatter)
    Can anyone help with silver? Ive been trying for aaggeeeeesssss.
    Thanks


    Posted from TSR Mobile
    Hi! How about you tell us where you're at so far? Can't really help much when it's so vague...
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Has a teacher ever helped you cheat?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.