Balance the equation _____N2H4 + ______ Fe (CN)63- + _____OH- = N2 + _____Fe(CN)64- + _____H2O

Balance the equation _N2H4 + Fe (CN)63- + _OH- = N2 + _Fe(CN)64- + ___H2O

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

Chapter4: Types Of Chemical Reactions And Solution Stoichiometry

Section: Chapter Questions

Problem 138CP: Polychlorinated biphenyls (PCBs) have been used extensively as dielectric materials in electrical...

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Polychlorinated biphenyls (PCBs) have been used extensively as dielectric materials in electrical transformers. Because PCBs have been shown to be potentially harmful, analysis for their presence in the environment has become very important. PCBs are manufactured according to the following generic reaction: C12H10+nCl2C12H10nCln.+nHCl This reaction results in a mixture of PCB products. The mixture is analyzed by decomposing the PCBs and then precipitating the resulting Cl asAgCl. a. Develop a general equation that relates the average value of n to the mass of a given mixture of PCBs and the mass of AgCl produced. b. A 0.1947-g sample of a commercial PCB yielded 0.4791 g of AgCl. What is the average value of n for this sample?
4-103 Caffeine, a central nervous system stimulant, has the molecular formula C8H10N402. (a) How many moles of caffeine are present in 6.19 1025 molecules of caffeine? (b) Imagine you dissolve caffeine in water to a volume of 100.0 mL, which is known to have a density of 1.23 g/mL. How many molecules of caffeine are present in this volume? (c) How many nitrogen atoms are present in 3.5 mg of caffeine? (d) Complete the skeletal structure of caffeine, where all the bonded atoms are shown but double bonds, triple bonds, and/or lone pairs are missing. (e) Identify the various types of geometries present in each central atom of caffeine using VSEPR theory. (f) Determine the various relative bond angles associated with each central atom of caffeine using VSEPR theory (g) What is the most polar bond in caffeine? (h) Would you predict caffeine to be polar or nonpolar? (j) Consider the combustion of caffeine, which results in formation of NO2(g) as well as other expected products. Write a balanced chemical equation for this reaction. (j) The heat of combustion for caffeine is 2211 kcall/mol. How much heat will be given off if 0.81 g of caffeine is burned completely? (k) Calculate the weight of H2O(g) that can be prepared from 8.00 g of caffeine mixed with 20.3 g of oxygen gas.
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Listen What is the balanced chemical equation that represents the following reaction? 80 goo go 6H + 2N – 2HN3 -> O 2N + 2H3 - 2H3N O 6H + 2N · 2NH3 → -> 6H + 2N – 2N3H 3H2 + N2 - 2NH3 V Saved Question 40 (1 point)
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1. What coefficients (in order from left to right) are needed to balance the following chemical equation? ___Fe2O3(s) + ___C(s) → ___Fe(s) + ___CO(g) a. 1, 2, 3, 3 b.1, 2, 1, 3 c 1, 3, 2, 3 d.2, 1, 2, 3
Balance this reaction:_Fe2O3(s) +_Co(g)->_fe(s)+_Co2(g)