Calculate the percent composition of barium in the compound barium chloride, bacl2.

 The  percent  composition  of barium  in  barium chloride   is 65.9%

calculation

percent   composition  =  molar weight  of barium/molar weight  of barium chloride  x 100

from  periodic table the molar weight of barium = 137.3

 and the  molar weight  of   BaCl2  = 137.3 +( 35.5 x 2)=208.3

% composition  is therefore = 137.3/208.3 x 100=65.9%

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