FIBER ANALYSIS - chymist.com
Figure F-1.Cross sections of several natural and synthetic fibers. Reproduced from Melone, et. al., Lab Manual for Crimminalistics, 6th ed, Prentice Hall.
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Identification of a Substance by Physical Properties
chymist.comsubstance present and are not useful in the identification of a substance. In this experiment, we will use three properties to identify a liquid substance: solubility, density and boiling point.. The solubility of a substance is usually expressed as …
NOMENCLATURE OF ORGANIC COMPOUNDS
chymist.comthese compounds had to come from a living organism, now they are synthesized in the laboratory. The simplest organic compounds are composed of carbon and hydrogen and are known as hydrocarbons. There are four types, or classes, of hydrocarbons: Alkanes: contain all C-C single bonds. These are known as saturated hydrocarbons.
THE SCIENCE OF SOAPS AND DETERGENTS
chymist.comDetergents are structurally similar to soaps, but differ in the water-soluble portion. Three examples of detergents are shown below. a sodium alkyl sulfate a sodium alkylbenzene sulfonate a glycerol (a non-ionic detergent) When a soap or detergent is added to water, a polar solvent, the molecules form clusters, known as micelles, in
WRITING CHEMICAL EQUATIONS
chymist.combalanced so that it conforms to the Law of Conservation of Matter. That is, there must be the same number of atoms of each element on the right hand side of the equation as there are on the left hand side. If the number of atoms of each element in the equation above are counted, it is observed that there are 1 atom of Fe
Determination of Vitamin C in Foods
chymist.comdestroys vitamin C. The US Department of Agriculture reports the following vitamin C levels: Amount of vitamin C, mg/100g Vegetable Raw Frozen Frozen then boiled Green beans 12.2 9.7 4.1 Broccoli 89.2 64.9 40.1 Note: Freezing fresh vegetables requires blanching, i.e., boiling for a short period to stop enzyme actions in the plant.
NAMES AND SYMBOLS OF COMMON ELEMENTS - chymist.com
chymist.com*Lanthanide Series 58 Ce 140.1 59 Pr 140.9 60 Nd 144.2 61 Pm (145) 62 Sm 150.4 63 Eu 152.0 64 Gd 157.3 65 Tb 158.9 66 Dy 162.5 67 Ho 164.9 68 …
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