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    Need help with question 8.
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    not 100% sure, but I think this may be it:

    The Relative Atomic Mass of Propane is 3x12+1x8 = 44 (The atomic masses of the elements added up)

    The RAM of oxygen is 5x16x2 = 160

    So, 110/44x160 = 400g of oxygen needed
 
 
 

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