Question #2be51

1 Answer
SCooke
Feb 13, 2017

86.96 wt.% permanganate, 13.14 wt.% ammonium ions.

Explanation:

First, we must make sure that we have the correct molecular formula for ammonium permanganate. NH_4MnO_4.
Then we add up all of the element gram-masses to find the total gram-molecular weight of the compound. Then we take the gram-mass of the permanganate ion and divide it by the total mass to get the relative percentage composition.

NH_4 = 18 MnO_4 = 119 NH_4MnO_4 = 137

NH_4/NH_4MnO_4 = 18/137 = 0.1314 = 13.14 wt.%

MnO_4 /NH_4MnO_4 = 119/137 = 0.8686 = 86.86 wt.%

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