If it takes three "breaths" to blow up a balloon to 1.2 , and each breath supplies the balloon with 0.060 moles of exhaled air, how many moles of air are in a 3.0 balloon.

Express your answer in moles using two significant figures

Would the answer be 0.38 mol?

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  1. Is it 1.2 L and 3.0 L ? If so,
    1.2 L / 3 breaths = 0.4 L / breath
    (3.00 L) / (0.4 L / breath) = 7.5 breaths
    (7.5 breaths)(0.060 mol/breath) = 0.45moles

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  2. we have 1.2 L and 3.0 L
    1.2 L / 3 breaths = 0.4 L / breath
    (3.00 L) / (0.4 L / breath) = 7.5 breaths
    (7.5 breaths)(0.060 mol/breath) = 0.45moles

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