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MSU CHMY 121IN - Density

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CHMY 121in Lecture 5Outline of Last Lecture- Maintaining Uncertainty o +/-  193.638576 9 005.988000 4 +224.740540 8424.367116  424Examples of Metric/English/ SI conversions- Temperatureo SI unit is the Kelvin (K, not in degrees)o Kelvin is the absolute temperature scaleo Other units include Celsius and Fahrenheito Conversion between the Celsius and Fahrenheit F=32+ 9/5(C) or C= 5/9(F-32)o Conversion between Celsius and Kelvin K=C+273.15 or C=K-273.15Greek PrefixesKilo- (k) one thousandDeci- (d) one-tenthCenti- (c) one-hundredthMilli- (m) one-thousandthMicro- ( ) one-millionthNano- (n) one-billionth**** These conversions are correct and do NOT affect Sig Figs**** 1 tsp= 0.000005 m^3Current Lecture- Densityo • Measure of compactness, “How much Matter is in a given volume?”o Density (D) =mass/volume=m/v=grams/milliliter=g/mLThese 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.Solid Metal Very DenseSolid Wood Less DenseLiquid Lesser DenseGas Least Dense- Intensive & Extensive Propertieso Density does not change when looking at different amounts (intensive property) Other intensive properties include color and temperatureo Extensive properties change when the amount of the sample changes Includes mass, volume, and length- Practice Calculating Densityo A cube that is 10.0 mm x 10.0 mm x 10.0 mm and has a mass of 4.70 g  Find the Density D=m/v D= ( 10.0 x 10.0 x 10.0)(4.70 g)= 0.047g/cm^3- Calculations  Unit Analysiso 3.5 weeks=.7 days. 24 hour. 60 min. 60 s = 2,116,800 s OR 2.1 x 10^6 s 1 week 1 day 1 hour 1 min- Rearranging Equationso Manipulating equations is a way to solve for variables without changing the meaning of an equationo Can do for addition/subtraction: X = W + Y  Y =?  W =?


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MSU CHMY 121IN - Density

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