Balance the equation_____N2H4 + ______ Fe (CN)63- + _____OH- = N2 + _____Fe(CN)64- + _____H2O

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Answered: Balance the equation _____N2H4 +…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter12: Gravimetric Methods Of Analysis

Section: Chapter Questions

Problem 12.14QAP

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3.11 Balance the following equations. (a) CaC2(s) + H2O(l)( Ca(OH)2(s) + C2H2(g) (b) (NH4)2CrO7(s) ( Cr2O3(s) + N2(g) + H2O (g) (c) CH3NH2(g) + O2(g) ( CO2(g) + N2(g) + H2O (g)
You have a chemical in a sealed glass container filled with air. The setup is sitting on a balance as shown below. The chemical is ignited by means of a magnifying glass focusing sunlight on the reactant. After the chemical has completely burned, which of the following is true? Explain your answer. a. The balance will read less than 250.0 g. b. The balance will read 250.0 g. c. The balance will read greater than 250.0 g. d. Cannot be determined without knowing the identity of the chemical.
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.
3.94 Calcium carbonate (limestone, CaCO3) dissolves in hydrochloric acid, producing water and carbon dioxide. An unbalanced net ionic equation for this reaction is given below. Balance it. CaCO3(s)+H3O+(aq)H2O(l)+CO2(g)+Ca2+(aq)
Balance each of the following chemical equations. a. KO2(s) + H2O(l) KOH(aq) + O2(g) + H2O2(aq) b. Fe2O3(s) + HNO3(aq) Fe(NO3)(aq) + H2O(l) c. NH3(g) + O2(g) NO(g) + H2O (g) d. PCl5(l) + H2O(l) H3PO4(aq) + HCl(g) e. CaO(s) + C(s) CaC2(s) + CO2 (g) f. MoS2(s) + O2(g) MoO3(s) + SO2 (g) g. FeCO3(s) + H2CO3(aq) Fe(HCO3)2(aq)
3.93 Adipic acid is used in the production of nylon, so it is manufactured in large quantities. The most common method for the preparation of adipic acid is the reaction of cyclohexane with oxygen. Balance the skeleton equation shown be1ow.
Balance the following equations. a Ca3(PO4)2 + H3PO4 Ca(H2PO4)2 b MnO2 + HCl MnCl2 + Cl2 + H2O c Na2S2O3 + I2 NaI + Na2S4O6 d Al4C3 + H2O Al(OH)3 + CH4 e NO2 + H2O HNO3 + NO
Consider the balanced chemical equation :math>A+5B3C+4D en equal masses of A and B are reacted, which is limiting, A or B? Justify your choice. If the molar mass of A is greater than the molar mass of B, then A must be limiting. If the molar mass of A is less than the molar mass of B, then A must be limiting. If the molar mass of A is greater than the molar mass of B, then B must be limiting. If the molar mass of A is less than the molar mass of B, then B must be limiting.
What is meant by a limiting reactant in a particular reaction? In what way is the reaction “limited”? What does it mean to say that one or more of the reactants are present in excess? What happens to a reaction when the limiting reactant is used up?
4.37 The theoretical yield and the actual yield for various reactions are given below. Determine the corresponding percentage yields. Theoretical Yield Actual Yield Reaction 1 35.0 g 12.8 g Reaction 2 9.3 g 120 mg Reaction 3 3.7 metric tons 1250 kg Reaction 4 40.0 g 41.0 g

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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