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5. A 25.0 gram sample of a compound contains 6.64 grams of potassium (K, at.wt. = 39.1), 8.84 grams of chromium (Cr, at.wt. = 52.0), and 9.52 grams of oxygen (O, at.wt. = 16.0). The empirical formula of this compound is a. K₂Cr₂O7 c. K3CrO3 d. K₂Cr₂0₂ e. KCrO4 b. K₂CRO4

5. A 25.0 gram sample of a compound contains 6.64 grams of potassium (K, at.wt. = 39.1), 8.84 grams of chromium (Cr, at.wt. = 52.0), and 9.52 grams of oxygen (O, at.wt. = 16.0). The empirical formula of this compound is a. K₂Cr₂O7 c. K3CrO3 d. K₂Cr₂0₂ e. KCrO4 b. K₂CRO4

Chemistry
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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5. A 25.0 gram sample of a compound contains 6.64 grams of potassium (K, at.wt. = 39.1), 8.84 grams of chromium |(Cr, at.wt. = 52.0), and 9.52 grams of oxygen (O, at.wt. = 16.0). The empirical formula of this compound is a. K₂Cr₂O7 d. K7Cr₂O₂ e. KCrO4 b. K₂CRO4 c. K3CrO3 6. On what electrode and What mass (in gram) of chlorine gas could be released from a solution of nickel(II) chloride by a current of 0.25 amperes flowing for 10 hours? (At. Wt Cl=35.5g/mol). a. 3.311gm on cathode b. 6.603gm on anode c. 3.311gm on anode d. 6.603gm on cathode 7-Identify the correct statement(s) in relation to the following reaction Zn + 2HCl → ZnCl₂ + H₂ a.zinc is acting as an oxidant b. chlorine is acting as a reductant c.hydrogen ion is acting as an oxidant d. zinc is acting as a reductant
Transcribed Image Text:5. A 25.0 gram sample of a compound contains 6.64 grams of potassium (K, at.wt. = 39.1), 8.84 grams of chromium |(Cr, at.wt. = 52.0), and 9.52 grams of oxygen (O, at.wt. = 16.0). The empirical formula of this compound is a. K₂Cr₂O7 d. K7Cr₂O₂ e. KCrO4 b. K₂CRO4 c. K3CrO3 6. On what electrode and What mass (in gram) of chlorine gas could be released from a solution of nickel(II) chloride by a current of 0.25 amperes flowing for 10 hours? (At. Wt Cl=35.5g/mol). a. 3.311gm on cathode b. 6.603gm on anode c. 3.311gm on anode d. 6.603gm on cathode 7-Identify the correct statement(s) in relation to the following reaction Zn + 2HCl → ZnCl₂ + H₂ a.zinc is acting as an oxidant b. chlorine is acting as a reductant c.hydrogen ion is acting as an oxidant d. zinc is acting as a reductant
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