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  1. What are the number of moles of CO2 which contains 16 g of oxygen?

    2. A.

     0.5 mole
    B.

     0.2 mole
    C.

     0.4 mole
    D.

     0.25 mole

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    Answer : Option A

    Explanation :

    One mole of CO2 has mass of 44 g and 32 g of O2.
    So 16 g of O2 have 22 g of CO2 or 0.5 moles of it.

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