CH 304K 1st Edition Lecture 7 Outline of Last Lecture I. Writing and balancing equationsOutline of Current Lecture II. Indoor Air PollutionIII. MeasurementsIV. Significant FiguresV. RoundingVI. DensityCurrent LectureIndoor Air Pollution- Since buildings are made to keep air in to save on A/C and heating costs, pollutants also get trapped inside, too- Some indoor air pollutants: NO, NO2, SO2, CO, O3, PM, and many others- Candles and incense can add pollutants out of a room and take away oxygen- Example: Radon is emitted from granite; people in Northeast build airtight basements of granite and radon builds up; extended exposure can cause cancerMeasurements- SI units:o Time- seconds (s)o Mass- kilogram (kg)o Distance- meter (m)o Temperature- Kelvin (K)- Know all metric prefixes (listed in book)- Be able to convert:These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.o Between different metric prefixeso Feet to incheso Celsius to KelvinSignificant Figureso All nonzero numbers are significanto Any zero between two nonzero numbers is significanto Any zero to the left of first nonzero is NOT significantRoundingo Never round anything until you have finished the problemDensityo Physical property; can be used to distinguish two different substanceso Density= mass divided by volumeo Density of water=
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