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A reaction of 47.7g of Na and 34.7 g of Br2 yields 37.0g of NaBr. What...

A reaction of 47.7g of Na and 34.7 g of Br2 yields 37.0g of NaBr. What is the percent yield?
2 Na (s) + Br2 (g) ---------------> 2 NaBr (s)

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