chemistry

What mass of water, in grams, would have to be decomposed to produce 28.7 L of molecular oxygen at STP?

asked by Lisa
  1. i think you can use stoichiometry for this question. i shud help

    posted by sabeen
  2. 2H2O->2H2+O2

    At STP, 1 mol = 22.4L

    so, convert L O2-> mol O2

    then, convert mol O2-> mol H20 by mole ratio

    finally, multiply by molar mass H2O

    posted by TutorCat

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