Polluted air can have carbon monoxide (CO) levels of 15.0...

Polluted air can have carbon monoxide (CO) levels of 15.0 ppm. An average human inhales about 0.50 L of air per breath and takes about 20 breaths per minute. How many milligrams of carbon monoxide dees the average person inhale in an 8 -hour period in this level of carbon monoxide pollution? Assume that the carbon monoxide has a density of 1.2 $\mathrm{g} / \mathrm{L}$ .(Hint: 15.0 ppm CO means 15.0 $\mathrm{L}$ $\mathrm{CO} \operatorname{per} 10^{6} \mathrm{L}$ air. $)$

Polluted air can have carbon monoxide (CO) levels of 15.0 ppm. An average human inhales about 0.50 L of air per breath and takes about 20
breaths per minute. How many milligrams of carbon monoxide dees the average person inhale in an 8 -hour period in this level of carbon monoxide pollution? Assume that the carbon monoxide has a density of 1.2 $\mathrm{g} / \mathrm{L}$ .(Hint: 15.0 ppm CO means 15.0 $\mathrm{L}$ $\mathrm{CO} \operatorname{per} 10^{6} \mathrm{L}$ air. $)$

Key Concepts

Concentration Conversion

This concept involves translating concentrations expressed in parts per million (ppm) into a usable ratio. Understanding that 15.0 ppm means 15.0 liters of carbon monoxide per 1,000,000 liters of air allows one to calculate the actual volume of CO present in a given volume of air, which is essential when working with gaseous pollutants.

Respiratory Volume Calculation

This concept deals with determining the total volume of air inhaled over a period by combining the volume per breath, breathing rate, and duration of exposure. It is important in environmental health to understand how much air, and consequently how much pollutant, is inhaled by a person over a specified time period.

Density and Mass Conversion

This involves converting the volume of a substance into its mass using the density value provided. Knowing that the density of carbon monoxide is 1.2 g/L enables the calculation of the mass of CO present in the inhaled volume, bridging the gap between volume measurements and mass-based exposure assessments.

Unit Conversions

Unit conversion is crucial for ensuring that all measurements are in compatible units. This includes converting between liters, milliliters, grams, and milligrams, and is a key skill in solving physics and chemistry problems, especially when different units are used for volume, mass, and concentration.

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