An unknown compound containing tellurium and bromine is analyzed and it is determined that 28.53% of the compound by mass is composed of tellurium. What is the mass percent of Br in the compound?\
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Answer:
0.22 mol
Explanation:
First , we have to calculate the mass of Te in the sample . We simply multiply the sample mass by the percentage of Te ( 28.53 % = 28.53 / 100 ) 100.00 g x 28.53 / 100 = 28.53 g Te The molar mass of Te is 127.60 g . Thus , the mass of 1 mol of Te is 127.60 g . With this , we calculate how many moles of Te there are in 28.53 g of Te : 28.53 g Te x 1 mol Te / 127.60 g Te = 0.223 mol = 0.22 mol
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