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    1) Find the volume at RTP of 0.2g of Helium gas in cm3

    Relative mass of Helium : 4
    0.2 / 4 = 0.05
    0.05 x 24,000 = 1,200 cm3


    2) Find the volume at RTP of 2.0g of CH4 in cm3

    Relative mass of CH4 = 16
    2 / 16 = 0.125
    0.75 x 24,000 = 3,000 cm3



    Was completing these questions and the answers don't feel right. Are they correct? If not could someone please guide me to correct working
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    \dfrac{2}{16} \neq 0.75
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    (Original post by alow)
    \dfrac{2}{16} \neq 0.75
    Huh?
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    (Original post by sammyj97)
    Huh?
    Huh?
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    (Original post by sammyj97)
    1) Find the volume at RTP of 0.2g of Helium gas in cm3

    Relative mass of Helium : 4
    0.2 / 4 = 0.05
    0.05 x 24,000 = 1,200 cm3


    2) Find the volume at RTP of 2.0g of CH4 in cm3

    Relative mass of CH4 = 16
    2 / 16 = 0.75
    0.75 x 24,000 = 18,000 cm3



    Was completing these questions and the answers don't feel right. Are they correct? If not could someone please guide me to correct working
    yep they are correct.
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    (Original post by Hayley Williams)
    yep they are correct.
    The second one definitely isn't...
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    (Original post by alow)
    The second one definitely isn't...
    why?
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    (Original post by sammyj97)
    why?
    \dfrac{2}{16} \neq 0.75
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    (Original post by sammyj97)
    1) Find the volume at RTP of 0.2g of Helium gas in cm3

    Relative mass of Helium : 4
    0.2 / 4 = 0.05
    0.05 x 24,000 = 1,200 cm3


    2) Find the volume at RTP of 2.0g of CH4 in cm3

    Relative mass of CH4 = 16
    2 / 16 = 0.75
    0.75 x 24,000 = 18,000 cm3



    Was completing these questions and the answers don't feel right. Are they correct? If not could someone please guide me to correct working
    Sorry, wasn't paying attention to the actual numbers, just the method
    2/16 = 0.125
    0.125 x 24,000 = 3,000 cm3
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    (Original post by alow)
    \dfrac{2}{16} \neq 0.75
    Why didn't you just give him the correct answer, instead of being annoying?
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    (Original post by Hayley Williams)
    Why didn't you just give him the correct answer, instead of being annoying?
    Because giving someone correct answers rarely accomplishes anything, getting them to think and find the issue with a hint is much more effective.

    I don't post here to prove I can do the questions, I do it to help other people figure out the answers by themselves.

    Read this: http://www.thestudentroom.co.uk/show...9#post64637319
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    (Original post by alow)
    Because giving someone correct answers rarely accomplishes anything, getting them to think and find the issue with a hint is much more effective.

    I don't post here to prove I can do the questions, I do it to help other people figure out the answers by themselves.

    Read this: http://www.thestudentroom.co.uk/show...9#post64637319

    Her*

    Also I appreciate you trying to help but in all honesty your post with the picture made 0 sense to me hence the not replying. I posted all the working out and just wanted confirmation if they were right or wrong.

    I'm still unsure if they are or not but i guess i could wait until next week for my tutor.
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    (Original post by sammyj97)
    Her*

    Also I appreciate you trying to help but in all honesty your post with the picture made 0 sense to me hence the not replying. I posted all the working out and just wanted confirmation if they were right or wrong.

    I'm still unsure if they are or not but i guess i could wait until next week for my tutor.
    Your method is correct for both, but on the second one you have the line

    "2/16 = 0.75"

    that's not true so your final answer ends up wrong!

    Just change it so its right and everything is hunky dory
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    (Original post by sammyj97)
    Her*

    Also I appreciate you trying to help but in all honesty your post with the picture made 0 sense to me hence the not replying. I posted all the working out and just wanted confirmation if they were right or wrong.

    I'm still unsure if they are or not but i guess i could wait until next week for my tutor.
    Her?

    I didn't post a picture...

    It's very obvious what I was hinting at.
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    That = sign with a / means not equal to
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    (Original post by MexicanKeith)
    Your method is correct for both, but on the second one you have the line

    "2/16 = 0.75"

    that's not true so your final answer ends up wrong!

    Just change it so its right and everything is hunky dory
    Thank you so much! Just fixed it in my notes
    I'm always making silly mistakes by not double checking.

    suejiaiuo thanks
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    (Original post by sammyj97)
    Thank you so much! Just fixed it in my notes
    I'm always making silly mistakes by not double checking.
    Ahaha, no problem

    That is what alow was trying to tell you, just a bit unfortunate that you haven't come across the "not equal to" sign before!
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    hahah

    you will need to get used. Alow pointed an error for you, and that's why didn't mention correct. Look back, try more and more, and suddenly you will see yourself getting closer. You need to push yourself out of the box - that's learning.
 
 
 
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