mikaelakaczyns mikaelakaczyns

20-09-2016
Chemistry

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

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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

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