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    The question is:

    0.363g of a solid element Y is vaporised at 400K and 100kPa. It’s volume is found to be 47cm^3. Calculate the relative atomic mass of the element and identify which element Y is.

    Im using the ideal gas equation but I get a really weird answer

    Thanks in advance x
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    Cm^3 needs to be m^3.....
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    (Original post by icequeenTM)
    When using the ideal gas equation did you remember to rearrange to find out n?
    (Original post by Texxers)
    Cm^3 needs to be m^3.....

    Yh I did. I changed cm^3 to m^3, kPa to Pa and used the ideal gas constant of 8.314
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    100,000 * 4.7x10^-5 = n * 8.314 * 400

    Calculate n(moles) then do mass/moles to get Mr!
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    (Original post by Westsidegirl)
    Yh I did. I changed cm^3 to m^3, kPa to Pa and used the ideal gas constant of 8.314
    I got an Mr ot 256... you?
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    (Original post by Texxers)
    I got an Mr ot 256... you?
    I can’t find it on the periodic table
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    (Original post by Texxers)
    I got an Mr ot 256... you?
    Well I got 256.85 so 257 but I still don’t know which element it is
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    (Original post by Westsidegirl)
    Well I got 256.85 so 257 but I still don’t know which element it is
    Lol OFC there is no element with an Mr of 257 😂😂😂. Are you sure this isn't a compound?
 
 
 
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