anonymous
  • anonymous
Determine the theoretical and percent yield of hydrogen gas if 74.0 g water undergoes electrolysis to produce hydrogen and oxygen and 2.61 g hydrogen is collected.
Chemistry
chestercat
  • chestercat
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anonymous
  • anonymous
You need to start with the balanced chemical equation for the reaction.
anonymous
  • anonymous
done
anonymous
  • anonymous
Now, convert the 74.0 g H2O to grams of H2 using stoichiometry. This answer will be the theoretical (or maximum) yield.

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anonymous
  • anonymous
how
anonymous
  • anonymous
You'll need to molar mass of the water. Do you know how to find that using the periodic table?
anonymous
  • anonymous
74.0g H_2O *mole/mass of mole of water *1 mole H_2:1mole H_2O should give you what you need

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