Question

How many grams of NaBr are needed to produce 187 grams of CaBr2

Answer 1

You will need 96.3g (3sf)

Answer 2

nabr= 102.9g
cabr2= 199.9g

that means 2(102.9)=205.8g nabr produces 199.9g cabr
and x g of nabr produces 187g cabr2

205.8/x=199.9/187

so answer is 192.5 g nabr