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    Example 5: 15 kg m-3 = ? mg mL-1 (Remember: 1 mL = 1 cm3)

    Numerator:
    15kg/ m3 x 1000g/ 1 kg x 1000mg/ 1g = 1.5 x 107mg/ m3

    Denominator:
    1.5 x 107mg/ m3 x 13 m3/ 1003 cm3 x 1cm3/ 1mL = 15 mg mL-1

    Why do we not cube the last conversion factor? Is it because mL is a 3 dimensional measurement or something?
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    cm is a unit of length, it has to be cubed to make it a unit of volume. mL is a unit of volume, so in a way it is already cubed (its unit is length cubed).
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    (Original post by Borek)
    cm is a unit of length, it has to be cubed to make it a unit of volume. mL is a unit of volume, so in a way it is already cubed (its unit is length cubed).
    Thanks

    I just wanted to confirm
 
 
 
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