CHEM 110 Lecture Notes - Lecture 3: International System Of Units, Abbreviation, Significant Figures
1 Oct 2017
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English system feet, pounds, f [**we won"t use these] Scientific data: primarily metric, also use si units (international system of units) eg: joules, k. Abbreviation mass gram volume litre length metre time second temperature degree celsius kelvin g. Conversion factors relates one unit to another as a ratio for use in mathematical operation or. If the solution has been set up correctly, the correct units should be generated in the process. Density is specific for temperature, that is density changes with temperature. A copper (cu) coin has a mass of 3. 14 g. the density of copper is 8. 96 g/cm3. Given quantities and units: mass = 3. 14 g; density = 8. 96 g/cm3. Set up conversion factor: 1 cm3 / 8. 96 g or 8. 96 g / 1 cm3. Significant figures: 3 sig. figs. allowed in answer. Given quantities and units: 65. 3 g of mixture; 34. 2 % water; Equivalence statement: 100 g mix = 34. 2 g water.
