mikaelakaczyns
mikaelakaczyns mikaelakaczyns
  • 20-09-2016
  • Chemistry
contestada

How many grams of Br are in 255 g of CaBr2?

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Willchemistry
Willchemistry Willchemistry
  • 25-09-2016
Molar mass:

Br = 79.904 g/mol
CaBr2 = 199.886 g/mol

CaBr2 = 2 Br + Ca

199.886 g --------------- 2 x 79.904 g
255 g -------------------- ?? ( mass of Br )

255 x 2 x 79.904 / 199.886 =

 40751.04 / 199.886 =>203.87 g of Br

hope his helps!
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