The EPA has established two primary air quality standards for carbon monoxide (CO). One allows for 35 ppmv CO, the other allows for 9 ppmv CO. One of these is an 8-hour standard, the other is a 1-hour standard. Identify which one is which and explain why the values differ for these standards.

Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter1: Introduction To Chemistry
Section1.1: A Story Of Two Substances
Problem 6SSC
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The EPA has established two primary air quality standards for carbon monoxide (CO). One allows for 35 ppmv CO, the other allows for 9 ppmv CO. One of these is an 8-hour standard, the other is a 1-hour standard. Identify which one is which and explain why the values differ for these standards. 

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