In Exercise, set up an appropriate equation and solve. Data are accurate to two sig. digits unless greater accuracy is given.
After installing a pollution control device, a car’s exhaust contained the same amount of pollutant after 5.0 h as it had in 3.0 h.
Before the installation the exhaust contained 150 ppm/h (parts per million per hour) of the pollutant. By how much did the device reduce the emission?
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