Here are the essential concepts you must grasp in order to answer the question correctly.
Concentration Calculation
Concentration refers to the amount of a substance in a given volume of solution or air. In this problem, we need to calculate how the emission of formaldehyde from plywood affects the air concentration in a room. The concentration is expressed in micrograms per cubic foot (μg/ft³), and understanding how to convert the total emission over time into this unit is crucial for solving the problem.
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Volume and Emission Rate
The volume of the room (800 ft³) and the emission rate of formaldehyde (140 μg/hr from one square foot of plywood) are key to determining how long it will take for the concentration to reach a harmful level. By calculating the total amount of formaldehyde emitted over time and relating it to the room's volume, we can find the time required to reach the specified concentration.
Time Calculation
Time calculation involves determining how long it takes for a process to reach a certain state. In this scenario, we need to find the time it takes for the concentration of formaldehyde to reach 33 μg/ft³. This requires setting up an equation that relates the total emission over time to the desired concentration, allowing us to solve for the time variable.
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