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a decomposition reaction?

a decomposition reaction?

Chemistry
Chemistry
10th Edition
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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Hi! I need answers in these three questions! Thank u very much.

Which of the following reactions involving iron can be classified as a decomposition reaction? Select one: O a. FeCOa{e) + 2 HCl(aq) → FeCl2(aq}) + H2CO3(aq) O b. 2 FeCO3s) → 2 Fe(s) + 2 C(graphite) + 3 02(g) О с. 2 Fets) + 6 HClag) FeCl(ag) + ЗН2(9) O d. 4 Fes) + 3 02(g) → 2 Fe203(s) Consider the reaction below: 2 Mn04 + 5 C20,2- + 16 H →2 Mn2* + 8 H20 + 10 co2 A 30.0 ml sample of an oxalate solution is found to react completely with 14.5 mL of a 0.1725 M solution of Mn04. What is the oxalate ion concentration in the sample? Select one: 0.141 M O b. 0.208 M Oc. 0.083 M O d. 0.033 M A 0.9182 g sample of CaBr, is dissolved in enough water to give 500.0 mL of solution. A 15.00 mL aliquot of the resulting sclution is transferred to a volumetric flask and is diluted to 100.0 mL. Which of the following statements is FALSE? Select one: Oa. The concentration of the CaBr, in the 15.00 mL aliquot and in the 500.0 mL solution are equal. Ob. The number of moles of CaBr2 in the 15.00 mL aliquot and the 100.0 mL solution are equal. The number of moles of CaBr2 in the 500.0 mL solution is greater than that in the 100.0 mL solution. O d. The concentration of CaBr2 in the 500.0 mL solution is greater than that in the 15.00 mL aliquot.
Transcribed Image Text:Which of the following reactions involving iron can be classified as a decomposition reaction? Select one: O a. FeCOa{e) + 2 HCl(aq) → FeCl2(aq}) + H2CO3(aq) O b. 2 FeCO3s) → 2 Fe(s) + 2 C(graphite) + 3 02(g) О с. 2 Fets) + 6 HClag) FeCl(ag) + ЗН2(9) O d. 4 Fes) + 3 02(g) → 2 Fe203(s) Consider the reaction below: 2 Mn04 + 5 C20,2- + 16 H →2 Mn2* + 8 H20 + 10 co2 A 30.0 ml sample of an oxalate solution is found to react completely with 14.5 mL of a 0.1725 M solution of Mn04. What is the oxalate ion concentration in the sample? Select one: 0.141 M O b. 0.208 M Oc. 0.083 M O d. 0.033 M A 0.9182 g sample of CaBr, is dissolved in enough water to give 500.0 mL of solution. A 15.00 mL aliquot of the resulting sclution is transferred to a volumetric flask and is diluted to 100.0 mL. Which of the following statements is FALSE? Select one: Oa. The concentration of the CaBr, in the 15.00 mL aliquot and in the 500.0 mL solution are equal. Ob. The number of moles of CaBr2 in the 15.00 mL aliquot and the 100.0 mL solution are equal. The number of moles of CaBr2 in the 500.0 mL solution is greater than that in the 100.0 mL solution. O d. The concentration of CaBr2 in the 500.0 mL solution is greater than that in the 15.00 mL aliquot.
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