Search results
Results from the WOW.Com Content Network
A coded letter from Benedict Arnold, originally written in invisible ink. Handwriting by Peggy Shippen Arnold is interspersed with coded communication in Arnold's hand. Invisible ink , also known as security ink or sympathetic ink , is a substance used for writing, which is invisible either on application or soon thereafter, and can later be ...
Water is a tasteless, odorless liquid at ambient temperature and pressure. Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue color. [ 4 ] This can easily be observed in a water-filled bath or wash-basin whose lining is white.
Colourless. Look up colourless or colorless in Wiktionary, the free dictionary. Colourless or colorless may refer to: Transparency and translucency, transmitting all or most colours. Neutral-density filter. Black and white, a form of visual representation that does not use color. Grayscale.
The majority of mined diamonds fall between white and pale yellow or brown; what is known as the normal color range. Diamonds of more intense color (usually yellow, but in some cases red, green or blue) are termed fancy color diamonds. Black diamonds are also fancy color diamonds.
Anhydrous perchloric acid is a colourless mobile liquid that is sensitive to shock that explodes on contact with most organic compounds, sets hydrogen iodide and thionyl chloride on fire and even oxidises silver and gold. Although it is a weak ligand, weaker than water, a few compounds involving coordinated ClO − 4 are known. [59]
Color (American English) or colour (British and Commonwealth English) is the visual perception based on the electromagnetic spectrum. Though color is not an inherent property of matter, color perception is related to an object's light absorption, reflection, emission spectra, and interference. For most humans, colors are perceived in the ...
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid (Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen, and hydrogen, with the molecular formula H2SO4. It is a colorless, odorless, and viscous liquid that is soluble with water.
Lead (II) nitrate is an inorganic compound with the chemical formula Pb (NO 3) 2. It commonly occurs as a colourless crystal or white powder and, unlike most other lead (II) salts, is soluble in water. Known since the Middle Ages by the name plumbum dulce, the production of lead (II) nitrate from either metallic lead or lead oxide in nitric ...