CHEM 1127Q Lecture Notes - Lecture 1: Trailing Zero, Boiling Point, Decimal Mark
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Found in healthcare, farming, cars and infomercials. Law: additional testing yields constant observations, application of theories. Theory: additional testing supports hypothesis, explains everything, basic concept. Series of steps used to make conclusions. Conservation of mass: matter is neither created nor destroyed in a chemical reaction. Physical properties: occur without chemical change, melting point, boiling point, density, distillation (separation by boiling point) Properties (such as mass and volume) that depend on the amount of matter being measured. Properties (such as density and color) that do not depend on the amount of matter being measured. Significant figures: all non-zero numbers are significant, all interior zeros are significant, trailing zeros to the right of a decimal point are significant. 5000 1 sig fig, if decimal at right end 4 sig figs. Multiplication and division: take the least number of sig figs, 10. 0/3. 000= 3. 33333, 3 sig figs and 4 sig figs 3. 33. Addition and subtraction: decimal places, 15624 + 1. 02 = 15625. 02 15625.
