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5.50 grams of nitrogen triiodide are detonated in a closed 7.00 L flask that was under full vacuum initially. The nitrogen triiodide forms nitrogen gas and iodine gas upon detonation. What is the partial pressure of the iodine gas (in Pa) when the vessel cools down to 23 C?

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  • chemistry -

    2NI3 ==> N2 + 3I2

    5.50 g NI3 = ?? moles. moles = grams/molar mass.

    Using the coefficients in the balanced equation, convert moles NI3 to moles N2 and to moles I2. N2 should be 1/2 moles NI3 and I2 should be 3/2 moles NI3.
    Then use PV = nRT with new conditions of T etc to calculate P. Post your work if you get stuck.

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