A compound contains 26.57% potassium, 35.36% chromium and the remaining oxygen. What is its empirical formula? (At.wt. of K=39.1, Cr=52, 0=16)

A compound contains 26.57% potassium, 35.36% chromium and the remainin

1.	A compound contains 26.57% potassium, 35.36% chromium and the remaining oxygen. What is its empirical formula? (At.wt. of K=39.1, Cr=52, 0=16)
Answer» SOLUTION :RATIO of K : Cr : O = `(26.6)/(39.1) : (35.4)/(52) : (38.1)/(16) = 0.68 : 0.68 : 2.38 = 2 : 2 : 7` The empirical formula is ` K_(2)Cr_(2)O_(7)`.