CHEM 1P Lecture Notes - Lecture 2: Kilogram, Horse Length
Document Summary
Matter: things that have mass, the world is made of molecules, which are made of atoms, atoms are small 1 grain of table salt is 0. 5 mm, while an atom is 10 million times smaller (50 pm) Building blocks: atoms combine to make molecules, c + o + o = co2 (1 carbon and 2 oxygen atoms combine to make a molecule of carbon dioxide) Value: we think of a value as just a number, but that is actually incomplete. In science, a value is a quantitative description of a unit and value for example: 20 feet, 12 inches, 18 pounds, etc. Base units for si system: length (meter, mass (kilogram, time (second, temperature (kelvin) 273. 16 temperature difference between absolute zero and triple point temperature of water: volume (liter, energy (joule, 1 cubic meter= 1000 liters.
