an unknown compound was found to have a % composition of26.6&potassium35.4% chromium and the remainder oxygen.

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what is its empirical formula?

2007-03-18 20:00:38 · 2 answers · asked by kevin 1 in Science & Mathematics ➔ Chemistry

Potassium Dichromate

2007-03-18 20:05:52 · answer #1 · answered by Swamy 7 · 0⤊ 0⤋

K : Cr :O
26.6/39:35.4/52:(100-26.6-35.4)/16
0.682 :0.681 : 2.375
2 : 2 : 7
The emperical formula is K2Cr2O7

2007-03-19 03:10:57 · answer #2 · answered by beuuu 2 · 0⤊ 0⤋