An oxybromate compound, KBrO_x, where x is a whole number, is analyzed and found to contain 47.84% Br by mass. What is x?

Name: An oxybromate compound, KBrO x , where x is a whole number, is analyzed and found to contain 47.84% Br by mass. What is x?
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Question

Quizplus · Accepted Answer

The molar mass of Br is approximately 79.9 g/mol. If Br is 47.84% of the compound's mass, then the mass of KBrO_x is approximately 166.9 g/mol. Subtracting the mass of K (39.1 g/mol) gives 127.8 g/mol for BrO_x. Solving for x in BrO_x gives x = 3.

An Oxybromate Compound, KBrOx, Where X Is a Whole Number

An Oxybromate Compound, KBrO_x, Where X Is a Whole Number