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The cathode reaction in the Leclanch cell is given by

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro ISBN: 9780321809247 1

Solution for problem 18.8 Chapter 18

Chemistry: A Molecular Approach | 3rd Edition

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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Chemistry: A Molecular Approach | 3rd Edition

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Problem 18.8

The cathode reaction in the Leclanch cell is given by 2MnO2(s) 1 Zn21(aq) 1 2e2 ZnMn2O4(s) If a Leclanch cell produces a current of 0.0050 A, calculate how many hours this current supply will last if there are initially 4.0 g of MnO2 present in the cell. Assume that there is an excess of Zn21 ions.

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General Chemistry 1305 Week 2 Notes 1.Dimensional Analysis 1.1 Units of Measurement Quantities and measurements made in the lab or elsewhere have a numeric value, however, this numeric value is meaningless unless it’s followed by a unit which relates the number to a certain property or measurement. Currently there are two main unit systems, the American system and the SI (Systeme International) which is widely accepted in all sciences. The SI units are:  Volume : Volume is the amount of three-dimensional space a 3 substance occupies. cubic meter (m ).  Mass: Mass is the amount of matter in a substance.  the SI unit is the kilogram (kg).  Length: the SI unit is the meter (m).  Temperature: is a measurement of the kinetic energy of molecules inside a sample. The more motion that occurs, the higher the temperature. While Americans use Faranheit and the rest of the world uses Celsius, the SI unit for temperature is Kelvin (K). Because measurements and calculations give results that vary from really small numbers to huge ones, a system exists to help express these values: 1.2 Scientific Notation As well as prefixes, scientific notation is method to easily express small and large numbers. Numbers expressed with scientific notation have the following format: 500.00= 5.00000*10^2. (example of a number greater than 1), 10 is squared which means the decimal point is moved two places to the right. 0.005

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Chapter 18, Problem 18.8 is Solved
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Textbook: Chemistry: A Molecular Approach
Edition: 3
Author: Nivaldo J. Tro
ISBN: 9780321809247

Chemistry: A Molecular Approach was written by and is associated to the ISBN: 9780321809247. The full step-by-step solution to problem: 18.8 from chapter: 18 was answered by , our top Chemistry solution expert on 02/22/17, 04:35PM. The answer to “The cathode reaction in the Leclanch cell is given by 2MnO2(s) 1 Zn21(aq) 1 2e2 ZnMn2O4(s) If a Leclanch cell produces a current of 0.0050 A, calculate how many hours this current supply will last if there are initially 4.0 g of MnO2 present in the cell. Assume that there is an excess of Zn21 ions.” is broken down into a number of easy to follow steps, and 56 words. This full solution covers the following key subjects: Cell, leclanch, MNO, current, ions. This expansive textbook survival guide covers 82 chapters, and 9454 solutions. This textbook survival guide was created for the textbook: Chemistry: A Molecular Approach, edition: 3. Since the solution to 18.8 from 18 chapter was answered, more than 241 students have viewed the full step-by-step answer.

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The cathode reaction in the Leclanch cell is given by