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SI Units and Density

SI Units and Density. International System of Units (SI). adopted in 1960 seven base units which all others can be derived m, kg, K, s, mol, cd , A. Common Metric Prefixes. Length a linear measurement meter (m) common units- cm, m, km. Volume space occupied by a sample of matter

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SI Units and Density

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  1. SI Units and Density

  2. International System of Units (SI) • adopted in 1960 • seven base units which all others can be derived • m, kg, K, s, mol, cd, A

  3. Common Metric Prefixes

  4. Length • a linear measurement • meter (m) • common units- cm, m, km

  5. Volume • space occupied by a sample of matter • cubic meter (m3) but we use the smaller, non-SI unit liter (L) most of the time instead • common units- L, ml, cm3, µL • should be measured at 0°C

  6. Mass • measures the quantity of matter • kilogram (kg) • common units- kg, g, mg, µg

  7. Temperature • measures kinetic energy of particles • kelvin (K) • common units- K and °C

  8. Density • an intensive property • the ratio of an object’s mass to its volume • depends only on the substance, NOT ON THE SIZE of the substance • as temperature increases, density normally decreases (thermal expansion)

  9. Density D = M/V D = density M = mass V = volume

  10. Example problem • A piece of lead has a mass of 56.4 g and a volume of 5 cm3. Calculate its density. given formula set up problem answer w/ unit of measurement M= 56.4 g D=M/V V= 5 cm3 56.4g/5 cm310 g/ cm3 cm3 is same as ml so sometimes see g/ml

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