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eboneecook8704
07.10.2019 •
Chemistry
Paige heated 3.00 g mercury (ii) oxide (hgo, 216.59 g/mol) to form mercury (hg, 200.59 g/mol) and oxygen (o2, 32.00 g/mol). she collected 0.195 g oxygen. what was the percent yield of oxygen?
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Ответ:
2HgO → 2Hg + O₂
Next, we calculate the moles of HgO present:
moles = 3 / 216.59
moles = 0.014
Each mole of oxygen gas needs 2 moles of HgO to be produced.
Theoretical moles of oxygen gas produced = 0.014 / 2
= 0.007
Theoretical mass of oxygen = 0.007 x 32 = 0.224 grams
Percentage yield = actual yield / theoretical yield x 100
= 0.195 / 0.224 x 100
= 87.0%
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