Two gases .I' and I are found in the atmosphere in only trace amounts because they decompose quickly. When exposed to ultraviolet light the half-life of Xis 90. min, while that of Y' is 1.00 h. Suppose an atmospheric scientist studying these decompositions fills a transparent 20.0 L. flask with X and Y and exposes the flask to UV light. Initially, the partial pressure of X' is 75.0 % greater than the partial pressure of Y. As both gases decompose, will the partial pressure of X ever fall below the partial pressure of 1? Oyes 0.9 O no X ? If you said yes, calculate the time it takes the partial pressure of X to fall below the partial pressure of Y. Round your answer to 2 significant digits. min

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