Need chemistry help with a stoichiometry question

Chemistry
Tutor: None Selected Time limit: 1 Day

Red mercury (II) oxide decomposes to form mercury metal and oxygen gas according to the following equation: 2HgO (s)    2Hg (l) + O2 (g). If 3.00 moles of HgO decompose to form 1.25 moles of O2 and 503 g of Hg, what is the percent yield of this reaction?

A. 41.6%

B. 62.5%

C. 83.3%

D. 96.9%

May 29th, 2015

C. 83.3%

Thank you!!!!!!!!! :)

May 29th, 2015

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