What is the % of O2 in KClO3 by mass?

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Using:
K = 39.10
Cl = 35.45
Oxygen = 16.00

I'm a little lost--can anyone help me out and show me how they did it?

2007-03-11 09:53:47 · 1 answers · asked by Burnt Toast 1 in Science & Mathematics ➔ Chemistry

That's what I got, but it totally doesn't match up to my experimental data...so I'm gonna' have to go back and re-do the experiment I think...

2007-03-11 10:08:44 · update #1

3 * 16/(39.10 + 35.45 + 3*16) = 39.2%

2007-03-11 10:22:25 · answer #1 · answered by TheOnlyBeldin 7 · 0⤊ 0⤋