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Phosphorus Tribromide (PBr3, 270

Question 119

Multiple Choice

Phosphorus tribromide (PBr3, 270.69 g mol-1) and water (18.015 g mol-1) react to form phosphorous acid (H3PO3, 81.996 g mol-1) and hydrogen bromide (80.912 g mol-1) . If 0.5000 moles of phosphorus tribromide was reacted with 2.000 moles of water and 98.048 grams of hydrogen bromide were obtained, what was the percent yield from the reaction? Hint: Don't forget to include the coefficients from the balanced reaction in your consideration.


A) 72.16 %
B) 97.22 %
C) 78.62 %
D) 85.93 %
E) 80.79 %

Correct Answer:

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