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    kentchris38's Avatar
    kentchris38 Posts: 1, Reputation: 1
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    #1

    May 3, 2011, 02:53 PM
    Chemistry: Ideal gas laws
    Silane, SiH4, reacts with O2 to give silicon dioxide and water:

    A 5.20 L sample of SiH4 gas at 356 mmHg pressure and 25 oC is allowed to react with O2 gas. What volume of O2 gas , in liters, is required for complete reaction if the oxygen has a pressure of 425 mmHg at 25 oC?

    I understand PV=nRT in this case but we are not given the mols in order to solve for volume.
    DrBob1's Avatar
    DrBob1 Posts: 425, Reputation: 86
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    #2

    May 3, 2011, 03:34 PM
    You are given p, V & T for silane so you can solve for moles. You know p, T & n for oxygen and can solve for the volume. Tell us how you do.
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