Unformatted text preview: (b) μ g/L, (c) ppm, and (d) ppb? (a) 5 × 10-3 mg/L (b) 5 μ g/L (c) 5 × 10-3 ppm (d) 5 ppb 3. Calculate the mole fraction of carbon monoxide (CO) with a concentration of 103 μ g/m 3 . State your answer in parts per billion. Assume a temperature of 25ºC and a pressure of 1 atm. 90 ppb 4. Ice-resurfacing machines use internal combustion engines that give off exhaust containing CO and NO x . Average CO concentrations measured in local ice rinks have been reported as high as 107 ppm and as low 36 ppm. How do these concentrations compare with an outdoor air quality standard of 35 mg/m 3 ? Assume a temperature of 20ºC. 107 ppm is equivalent to 125 mg/m 3 . 36 ppm is equivalent to 42 mg/m 3 . Both high and low average concentrations of CO in ice rinks are higher than the outdoor air quality standard of 35 mg/m 3 ....
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- Spring '10
- Mole, Internal combustion engine, Parts-per notation, outdoor air quality, air quality standard, 20ºC. 107 ppm