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Air is 20.9% oxygen by volume.How many mL of air contains 175 mL of oxygen?

  • chemistry -

    So lets say we have 100 mL of air then this will contain 20.9 mL oxygen.

    Thus 100 mL/20.9 of air will contain
    1 mL of oxygen.

    So how many mL of air contain 150 mL of oxygen?

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