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Get Full Access to Chemistry: A Molecular Approach - 3 Edition - Chapter 3 - Problem 99
Get Full Access to Chemistry: A Molecular Approach - 3 Edition - Chapter 3 - Problem 99

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# A method used by the U S. Environmental Protection Agency

ISBN: 9780321809247 1

## Solution for problem 99 Chapter 3

Chemistry: A Molecular Approach | 3rd Edition

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Problem 99

A method used by the U S. Environmental Protection Agency (EPA) for determining the concentration of ozone in air is to pass the air sample through a 'bubbler5 containing sodium iodide, which removes the ozone according to the following equation: (a) How many moles of sodium iodide are needed to remove 5.95 * 10-6 mol of O3?; (b) How many grams of sodium iodide are needed to remove 1.3 mg of O3?

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Step-by-step solution Step 1 of 4 Answer : Ground-level or "bad" ozone is not emitted directly into the air, but is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOC) in the presence of sunlight. Emissions from industrial facilities and electric utilities, motor vehicle exhaust, gasoline vapors, and chemical solvents are some of the major sources of NOx and VOC. Breathing ozone can trigger a variety of health problems including chest pain, coughing, throat irritation, and congestion. It can worsen bronchitis, emphysema, and asthma. Ground-level ozone also can reduce lung function and inflame the linings of the lungs. Repeated exposure may permanently scar lung tissue. Ground-level ozone also damages vegetation and ecosystems. In the United States alone, ozone is responsible for an estimated \$500 million in reduced crop production each year. Under the Clean Air Act, EPA has set protective health-based standards for ozone in the air we breathe. EPA and others have instituted a variety of multifaceted programs to meet these health-based standards. Throughout the country, additional programs are being put into place to cut NOx and VOC emissions from vehicles, industrial facilities, and electric utilities. Programs are also aimed at reducing pollution by reformulating fuels and consumer/commercial products, such as paints and chemical solvents that contain VOC. Voluntary and innovative programs also encourage communities to adopt practices, such as carpooling, to reduce harmful emissions.

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