1 mol KMnO₄ contains 4 mol O, which has a molar mass of about 15.999 g/mol. Then the mass of O in the sample is
(4 mol) (15.999 g/mol) ≈ 63.996 g
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<span>2^(3x)/2^y = 2^(3x-y) = 2^12 = 4096</span>
